Daria Kasatkina career statistics

This is a list of the main career statistics of professional Russian tennis player Daria Kasatkina.[1]

Performance timelines

**Key**
W	F	SF	QF	#R	RR	Q#	P#	DNQ	A	Z#	PO	G	S	B	NMS	NTI	P	NH

(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.

To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.

Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in Win–loss records.[2]

Singles

Current after the 2024 Madrid Open.

Tournament	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	SR	W–L	Win %
Grand Slam tournaments
Australian Open	A	A	3R	1R	2R	1R	1R	2R	3R	1R	2R	0 / 9	7–9	44%
French Open	A	A	3R	3R	QF	2R	2R	3R	SF	4R		0 / 8	20–8	71%
Wimbledon	A	A	3R	2R	QF	1R	NH	2R	A[lower-alpha 1]	3R		0 / 6	10–6	63%
US Open	A	3R	1R	4R	2R	1R	1R	3R	1R	4R		0 / 9	11–9	55%
Win–loss	0–0	2–1	6–4	6–4	10–4	1–4	1–3	6–4	7–3	8–4	1–1	0 / 32	48–32	60%
National representation
Summer Olympics	NH		QF	NH				A	NH			0 / 1	3–1	75%
Billie Jean King Cup[lower-alpha 2]	A	A	1R	PO	A	PO2	W[lower-alpha 3]		DQ[lower-alpha 1]			1 / 2	5–1	83%
Year-end championships
WTA Finals	DNQ				Alt	DNQ	NH	DNQ	RR	DNQ		0 / 1	1–2	33%
WTA Elite Trophy[lower-alpha 4]	DNQ				RR	DNQ	NH			SF		0 / 2	3–2	60%
WTA 1000
Dubai / Qatar Open[lower-alpha 5]	A	A	2R	1R	1R	2R	1R	1R	3R	2R		0 / 8	4–8	33%
Indian Wells Open	A	A	QF	2R	F	2R	NH	3R	3R	3R	4R	0 / 8	14–8	64%
Miami Open	A	A	2R	2R	2R	3R	NH	A	2R	2R	3R	0 / 7	3–7	30%
Madrid Open	A	A	1R	1R	QF	1R	NH	2R	3R	4R	4R	0 / 8	10–8	56%
Italian Open	A	A	3R	1R	3R	3R	3R	1R	SF	4R		0 / 8	14–8	64%
Canadian Open	A	A	QF	2R	2R	2R	NH	2R	1R	QF		0 / 7	10–7	59%
Cincinnati Open	A	A	1R	2R	1R	2R	1R	1R	1R	3R		0 / 8	4–8	33%
Wuhan Open	A	A	3R	3R	3R	1R	NH					0 / 4	6–4	60%
China Open	A	A	2R	QF	1R	QF	NH			2R		0 / 5	8–5	62%
Guadalajara Open	NH								3R	A		0 / 1	1–1	50%
Win–loss	0–0	0–0	14–9	7–9	13–9	9–9	2–3	3–6	10–8	11–8		0 / 61	68–61	53%
Career statistics
	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	Career
Tournaments	1	5	21	22	25	21	12	21	23	25	13	Career total: 189
Titles	0	0	0	1	1	0	0	2	2	0	0	Career total: 6
Finals	0	0	0	2	3	0	0	4	2	2	3	Career total: 16
Hard win–loss	0–1	5–2	23–15	23–16	23–14	9–15	5–9	26–11	25–15	23–17	13–8	5 / 126	175–123	59%
Clay win–loss	0–0	2–3	8–5	8–4	12–7	4–4	3–3	5–5	12–5	12–6	8-4	1 / 46	74–46	62%
Grass win–loss	0–0	0–0	2–2	1–1	7–3	0–2	0–0	7–3	4–2	6–3	1-1	0 / 17	28–17	62%
Overall win–loss	0–1	7–5	33–22	32–21	42–24	13–21	8–12	38–19	41–22	41–26	22–13	6 / 189	277–186	60%
Win (%)	0%	58%	60%	60%	64%	38%	40%	67%	65%	61%	63%	Career total: 59.83%
Year–end ranking	370	72	27	24	10	69	71	26	8	18		$10,440,651

Doubles

Current after the 2022 Australian Open.

Tournament	2015	2016	2017	2018	2019	2020	2021	2022	SR	W–L	SR
Grand Slam tournaments
Australian Open	A	2R	1R	1R	A	A	1R	1R	0 / 5	1–5	17%
French Open	A	1R	2R	1R	3R	A	A	A	0 / 4	3–4	43%
Wimbledon	A	3R	A	A	1R	NH	1R	A[lower-alpha 1]	0 / 3	2–3	40%
US Open	A	2R	3R	A	2R[lower-alpha 6]	A	2R	A	0 / 4	5–3	63%
Win–loss	0–0	4–4	3–3	0–2	3–2	0–0	1–3	0–1	0 / 16	11–15	42%
Olympic Games
Summer Olympics	NH	QF	NH				A	NH	0 / 1	2–1	67%
WTA 1000
Dubai / Qatar Open[lower-alpha 5]	A	SF	2R	A	1R	A	A	A	0 / 3	4–3	50%
Indian Wells Open	A	2R	A	1R	A	NH	1R	A	0 / 3	1–3	25%
Miami Open	A	2R	A	1R	QF	NH	A	A	0 / 3	3–3	33%
Madrid Open	A	1R	A	A	1R	NH	A	A	0 / 2	0–2	0%
Italian Open	A	A	A	A	A	A	1R	A	0 / 1	0–1	0%
Canadian Open	A	1R	A	A	A	NH	A	A	0 / 1	0–1	0%
Cincinnati Open	A	1R	2R	A	A	A	2R	A	0 / 3	2–3	40%
Wuhan Open	A	1R	2R	A	1R	NH			0 / 3	1–3	33%
China Open	A	1R	A	A	A	NH			0 / 1	0–1	0%
Guadalajara Open	NMS/NH							A	0 / 0	0–0	–
Career statistics
Tournaments	1	17	7	5	9	0	7	2	Career total: 48
Titles	1	0	0	0	0	0	0	0	Career total: 1
Finals	1	1	1	0	0	0	0	0	Career total: 3
Hard win–loss	4–0	13–12	10–9	0–3	3–4	0–0	3–5	1–1	1 / 34	34–34	50%
Clay win–loss	0–0	1–3	0–0	0–1	2–2	0–0	0–1	0–0	0 / 7	3–7	30%
Grass win–loss	0–0	2–2	1–1	1–1	0–2	0–0	0–1	0–0	0 / 7	4–7	36%
Overall win–loss	4–0	16–17	11–10	1–5	5–8	0–0	3–7	1–1	1 / 48	41–48	46%
Year-end ranking	118	48	67	412	127	141	283	642

Significant finals

Singles: 1 (runner-up)

Result	Year	Tournament	Surface	Opponent	Score
Loss	2018	Indian Wells Open	Hard	Naomi Osaka	3–6, 2–6

WTA Tour finals

Singles: 16 (6 titles, 10 runner–ups)

Legend
Grand Slam
WTA 1000 (0–1)
WTA 500 (4–8)
WTA 250 (2–1)

Finals by surface
Hard (5–7)
Grass (0–2)
Clay (1–1)
Carpet

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Apr 2017	Charleston Open, United States	Premier[lower-alpha 7]	Clay	Jeļena Ostapenko	6–3, 6–1
Loss	1–1	Oct 2017	Kremlin Cup, Russia	Premier	Hard (i)	Julia Görges	1–6, 2–6
Loss	1–2	Feb 2018	Dubai Championships, United Arab Emirates	Premier	Hard	Elina Svitolina	4–6, 0–6
Loss	1–3	Mar 2018	Indian Wells Open, United States	Premier M[lower-alpha 8]	Hard	Naomi Osaka	3–6, 2–6
Win	2–3	Oct 2018	Kremlin Cup, Russia	Premier	Hard (i)	Ons Jabeur	2–6, 7–6^(7–3), 6–4
Win	3–3	Feb 2021	Phillip Island Trophy, Australia	WTA 250	Hard	Marie Bouzková	4–6, 6–2, 6–2
Win	4–3	Mar 2021	St. Petersburg Trophy, Russia	WTA 500	Hard (i)	Margarita Gasparyan	6–3, 2–1, ret.
Loss	4–4	Jun 2021	Birmingham Classic, United Kingdom	WTA 250	Grass	Ons Jabeur	5–7, 4–6
Loss	4–5	Aug 2021	Silicon Valley Classic, United States	WTA 500	Hard	Danielle Collins	3–6, 7–6^(12–10), 1–6
Win	5–5	Aug 2022	Silicon Valley Classic, United States	WTA 500	Hard	Shelby Rogers	6–7^(2–7), 6–1, 6–2
Win	6–5	Aug 2022	Championnats de Granby, Canada	WTA 250	Hard	Daria Saville	6–4, 6–4
Loss	6–6	Jan 2023	Adelaide International, Australia	WTA 500	Hard	Belinda Bencic	0–6, 2–6
Loss	6–7	Jun 2023	Eastbourne International, United Kingdom	WTA 500	Grass	Madison Keys	2–6, 6–7^(13–15)
Loss	6–8	Jan 2024	Adelaide International, Australia	WTA 500	Hard	Jeļena Ostapenko	3–6, 2–6
Loss	6–9	Feb 2024	Abu Dhabi Open, United Arab Emirates	WTA 500	Hard	Elena Rybakina	1–6, 4–6
Loss	6–10	Apr 2024	Charleston Open, United States	WTA 500	Clay	Danielle Collins	2–6, 1–6

Doubles: 3 (1 title, 2 runner-ups)

Legend
Grand Slam
WTA 1000
WTA 500 (1–2)
WTA 250

Finals by surface
Hard (1–2)
Grass (0–0)
Clay (0–0)
Carpet (0–0)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Oct 2015	Kremlin Cup, Russia	Premier	Hard (i)	Elena Vesnina	Irina-Camelia Begu Monica Niculescu	6–3, 6–7^(7–9), [10–5]
Loss	1–1	Oct 2016	Kremlin Cup, Russia	Premier	Hard (i)	Daria Gavrilova	Andrea Hlaváčková Lucie Hradecká	6–4, 0–6, [7–10]
Loss	1–2	Sep 2017	Pan Pacific Open, Japan	Premier	Hard	Daria Gavrilova	Andreja Klepač María José Martínez Sánchez	3–6, 2–6

ITF Circuit finals

Singles: 7 (7 titles)

Legend
$50,000 tournaments (1–0)
$25,000 tournaments (5–0)
$10,000 tournaments (1–0)

Finals by surface
Hard (1–0)
Clay (6–0)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Jan 2014	ITF Sharm El Sheikh, Egypt	10,000	Hard	Pernilla Mendesová	6–3, 6–4
Win	2–0	Sep 2014	Telavi Open, Georgia	25,000	Clay	Jasmine Paolini	6–1, 4–6, [10–7]
Win	3–0	Jan 2015	ITF Daytona Beach, United States	25,000	Clay	Elise Mertens	6–2, 4–6, 6–0
Win	4–0	May 2015	ITF Caserta, Italy	25,000	Clay	İpek Soylu	7–6^(7–4), 6–1
Win	5–0	Jun 2015	ITF Minsk, Belarus	25,000	Clay	Ganna Poznikhirenko	4–3 ret.
Win	6–0	Jun 2015	ITF Minsk, Belarus	25,000	Clay	Iryna Shymanovich	6–1, 6–1
Win	7–0	Sep 2015	Open de Saint-Malo, France	50,000	Clay	Laura Siegemund	7–5, 7–6^(7–4)

Doubles: 2 (2 runner-ups)

Legend
$60,000 tournaments
$25,000 tournaments (0–2)

Finals by surface
Hard (0–0)
Clay (0–2)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	May 2015	ITF Moscow, Russia	25,000	Clay	Olga Ianchuk	Carolin Daniels Alyona Sotnikova	2–6, 6–7^(10–12)
Loss	0–2	Jun 2015	ITF Minsk, Belarus	25,000	Clay	Olga Ianchuk	Valentyna Ivakhnenko Polina Monova	6–4, 0–6, [10–12]

Junior Grand Slam tournament finals

Girls' singles: 1 (title)

Result	Year	Tournament	Surface	Opponent	Score
Win	2014	French Open	Clay	Ivana Jorović	6–7^(5–7), 6–2, 6–3

Fed Cup/Billie Jean King Cup participation

This table is current through the 2019 Fed Cup[3]

Singles (3–1)

Edition	Round	Date	Location	Against	Surface	Opponent	W/L	Result
2016	WG PO	Apr 2016	Moscow (RUS)	Belarus	Clay (i)	Aliaksandra Sasnovich	W	6–3, 3–6, 6–1
2016	WG PO	Apr 2016		Belarus	Clay (i)	Victoria Azarenka	L	2–6, 7–5, 3–6
2017	WG PO	Apr 2017		Belgium	Clay (i)	Maryna Zanevska	W	5–7, 6–1, 6–0
2019	Z1 RR	Feb 2019	Zielona Góra (POL)	Denmark	Hard (i)	Karen Barritza	W	6–0, 6–4

Doubles (2–2)

Edition	Round	Date	Location	Against	Surface	Partner	Opponents	W/L	Result
2016	WG QF	Feb 2016	Moscow (RUS)	Netherlands	Hard (i)	Ekaterina Makarova	Cindy Burger Arantxa Rus	W	6–0, 6–2
2016	WG PO	Apr 2016	Moscow (RUS)	Belarus	Clay (i)	Elena Vesnina	Olga Govortsova Aryna Sabalenka	W	6–4, 6–2
2017	WG PO	Apr 2017	Moscow (RUS)	Belgium	Clay (i)	Elena Vesnina	Elise Mertens An-Sophie Mestach	L	1–6, 6–7^(2–7)
2019	Z1 RR	Feb 2019	Zielona Góra (POL)	Poland	Hard (i)	Margarita Gasparyan	Alicja Rosolska Iga Świątek	L	0–6, 6–3, 3–6

WTA Tour career earnings

Current after the 2022 US Open.[1]

Year	Grand Slam titles	WTA titles	Total titles	Earnings ($)	Money list rank
2013	0	0	0	2,217	100+
2014	0	0	0	14,183	392
2015	0	0	0	217,966	131
2016	0	0	0	904,463	34
2017	0	1	1	1,156,824	31
2018	0	1	1	2,747,441	13
2019	0	0	0	1,037,359	41
2020	0	0	0	308,998	80
2021	0	2	2	905,299	34
2022	0	2	2	1,508,435	19
Career	0	6	6	8,803,184	71

Career Grand Slam statistics

Seedings

The tournaments won by Kasatkina are in boldface, and advanced into finals by Kasatkina are in italics.[1]

Year	Australian Open	French Open	Wimbledon	US Open
2015	did not play	did not play	did not play	lucky loser
2016	not seeded	29th	29th	23rd
2017	23rd	26th	29th	not seeded
2018	22nd	14th	14th	11th
2019	10th	21st	29th	not seeded
2020	not seeded	not seeded	cancelled	not seeded
2021	not seeded	not seeded	not seeded	not seeded
2022	25th	20th	absent/expelled[lower-alpha 1]	10th
2023	8th	9th	11th	13th
2024	14th	10th

Best Grand Slam results details

Grand Slam winners are in boldface, and runner–ups are in italics.[1]

Singles

Round	Opponent	Rank	Score
Australian Open
2016 (not seeded)
1R	Anna Karolína Schmiedlová (27)	29	6–3, 6–3
2R	Ana Konjuh	87	6–4, 6–3
3R	Serena Williams (1)	1	1–6, 1–6
2022 (25th)
Round	Opponent	Rank	Score
1R	Stefanie Vögele (Q)	145	6–3, 6–1
2R	Magda Linette	53	6–2, 6–3
3R	Iga Świątek (7)	9	2–6, 3–6

Round	Opponent	Rank	Score
French Open
2022 (20th)
1R	Rebecca Šramková (LL)	176	6–2, 6–0
2R	Fernanda Contreras (Q)	225	6–0, 6–3
3R	Shelby Rogers	50	6–3, 6–2
4R	Camila Giorgi (28)	30	6–2, 6–2
QF	Veronika Kudermetova (29)	29	6–4, 7–6
SF	Iga Świątek (1)	1	2–6, 1–6

Round	Opponent	Rank	Score
Wimbledon
2018 (14th)
1R	Jana Fett	114	6–2, 7–5
2R	Yulia Putintseva	53	6–2, 6–3
3R	Ashleigh Barty (17)	17	7–5, 6–3
4R	Alison Van Uytvanck	47	6–7, 6–3, 6–2
QF	Angelique Kerber (11)	10	3–6, 5–7

Round	Opponent	Rank	Score
US Open
2017 (not seeded)
1R	Wang Qiang	56	6–7, 6–2, 6–3
2R	Christina McHale	63	7–5, 6–3
3R	Jeļena Ostapenko (12)	12	6–3, 6–2
4R	Kaia Kanepi (Q)	418	4–6, 4–6
2023 (13th)
Round	Opponent	Rank	Score
1R	Alycia Parks	42	2–6, 6–4, 6–2
2R	Sofia Kenin	101	2–6, 6–4, 6–4
3R	Greet Minnen (Q)	97	6–3, 6–4
4R	Aryna Sabalenka (2)	2	1–6, 3–6

Wins against top 10 players

Kasatkina has a 21–43 (32.8%) record against players who were, at the time the match was played, ranked in the top 10.[4]

#	Player	Rank	Event	Surface	Rd	Score	Rank
2016
1.	Venus Williams	No. 7	Auckland Open, New Zealand	Hard	1R	6–7^(4–7), 6–3, 6–3	No. 75
2.	Roberta Vinci	No. 8	Canadian Open, Canada	Hard	3R	7–5, 6–3	No. 33
2017
3.	Angelique Kerber	No. 1	Sydney International, Australia	Hard	2R	7–6^(7–5), 6–2	No. 26
4.	Angelique Kerber	No. 2	Qatar Open, Qatar	Hard	2R	6–4, 0–6, 6–4	No. 32
5.	Simona Halep	No. 2	Wuhan Open, China	Hard	2R	6–2, 6–1	No. 31
2018
6.	Caroline Wozniacki	No. 1	St. Petersburg Open, Russia	Hard (i)	QF	7–6^(7–2), 6–3	No. 23
7.	Garbiñe Muguruza	No. 3	Dubai Championships, United Arab Emirates	Hard	SF	3–6, 7–6^(13–11), 6–1	No. 24
8.	Caroline Wozniacki	No. 2	Indian Wells Open, United States	Hard	4R	6–4, 7–5	No. 19
9.	Angelique Kerber	No. 10	Indian Wells Open, United States	Hard	QF	6–0, 6–2	No. 19
10.	Venus Williams	No. 8	Indian Wells Open, United States	Hard	SF	4–6, 6–4, 7–5	No. 19
11.	Garbiñe Muguruza	No. 3	Madrid Open, Spain	Clay	3R	6–2, 4–6, 6–3	No. 15
12.	Caroline Wozniacki	No. 2	French Open, France	Clay	4R	7–6 ^(7–5), 6–3	No. 14
2021
13.	Iga Świątek	No. 9	Eastbourne International, United Kingdom	Grass	2R	4–6, 6–0, 6–1	No. 34
2022
14.	Garbiñe Muguruza	No. 3	Sydney International, Australia	Hard	QF	6–4, 6–4	No. 26
15.	Maria Sakkari	No. 5	Madrid Open, Spain	Clay	2R	3–6, 6–3, 6–1	No. 23
16.	Paula Badosa	No. 3	Italian Open, Italy	Clay	3R	6–4, 6–4	No. 23
17.	Aryna Sabalenka	No. 6	Silicon Valley Open, United States	Hard	QF	4–6, 7–5, 6–0	No. 12
18.	Paula Badosa	No. 4	Silicon Valley Open, United States	Hard	SF	6–2, 6–4	No. 12
19.	Coco Gauff	No. 4	WTA Finals, United States	Hard (i)	RR	7–6^(8–6), 6–3	No. 8
2023
20.	Caroline Garcia	No. 5	Eastbourne International, United Kingdom	Grass	QF	6–2, 2–1, ret.	No. 11
21.	Barbora Krejčíková	No. 10	WTA Elite Trophy, China	Hard	RR	7–5, 1–6, 6–1	No. 17
2024
22.	Jessica Pegula	5	Charleston Open, United States	Clay	SF	6–4, 4–6, 7–6^(7–5)	No.11

Notes

Suspended due to the ban of Russian and Belarusian athletes in light of the Russian invasion of Ukraine.
Formerly known as Fed Cup until 2020.
Edition is split into the two years due to COVID-19.
WTA Tournament of Champions was held from 2009 to 2014, when WTA Elite Trophy replaced it.
The first Premier 5 event of the year has switched back and forth between the Dubai Tennis Championships and the Qatar Ladies Open since 2009. Dubai was classified as a Premier 5 event from 2009 to 2011 before being succeeded by Doha for the 2012–2014 period. In 2015, Dubai regained its Premier 5 status while Doha was demoted to Premier status. The Premier 5 tournaments were reclassified as WTA 1000 tournaments in 2021.
Kasatkina and Anett Kontaveit withdrew from the 2019 US Open before their second-round match, which does not officially count as a loss.
The WTA Premier tournaments were reclassified as WTA 500 tournaments in 2021.
The WTA Premier 5 & Mandatory tournaments were reclassified as WTA 1000 tournaments in 2021.

References

"Daria Kasatkina career statistics". WTA Tennis. Archived from the original on 2019-11-12. Retrieved 8 March 2021.
"Daria Kasatkina [RUS] | Australian Open". ausopen.com. Archived from the original on 2020-06-07.
Kasatkina's Profile at Fed Cup
"Daria Kasatkina vs Top 10". Tennis Abstract. Retrieved 6 April 2024.

External links

Daria Kasatkina at the Women's Tennis Association
Daria Kasatkina at the International Tennis Federation
Daria Kasatkina at the Billie Jean King Cup

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[Wimbledon2022-3] Suspended due to the ban of Russian and Belarusian athletes in light of the Russian invasion of Ukraine.

[BJKP-4] Formerly known as Fed Cup until 2020.

[BJKC2020_21-5] Edition is split into the two years due to COVID-19.

[WET-6] WTA Tournament of Champions was held from 2009 to 2014, when WTA Elite Trophy replaced it.

[DubaiDoha-7] The first Premier 5 event of the year has switched back and forth between the Dubai Tennis Championships and the Qatar Ladies Open since 2009. Dubai was classified as a Premier 5 event from 2009 to 2011 before being succeeded by Doha for the 2012–2014 period. In 2015, Dubai regained its Premier 5 status while Doha was demoted to Premier status. The Premier 5 tournaments were reclassified as WTA 1000 tournaments in 2021.

[8] Kasatkina and Anett Kontaveit withdrew from the 2019 US Open before their second-round match, which does not officially count as a loss.

[WTA500-9] The WTA Premier tournaments were reclassified as WTA 500 tournaments in 2021.

[WTA1000-10] The WTA Premier 5 & Mandatory tournaments were reclassified as WTA 1000 tournaments in 2021.

[:0-1] "Daria Kasatkina career statistics". WTA Tennis. Archived from the original on 2019-11-12. Retrieved 8 March 2021.

[2] "Daria Kasatkina [RUS] | Australian Open". ausopen.com. Archived from the original on 2020-06-07.

[11] Kasatkina's Profile at Fed Cup

[12] "Daria Kasatkina vs Top 10". Tennis Abstract. Retrieved 6 April 2024.