Set margin — full ATP & WTA ranking

Leader

Iga Swiatek

2.22 games per set

Average: 0.24
Std. dev.: 0.53
Leader sits at: 3.7σ
Range: -1.82 … 2.22

153 players

#	Player	Value	Pctl	Sample
1	Iga Swiatek#8	2.22	100.0	357
2	SH Simona Halep	1.54	99.3	70
3	ER Elena Ruse	1.53	98.7	73
4	Aryna Sabalenka#1	1.48	98.0	325
5	Elena Rybakina#2	1.35	97.4	305
6	Coco Gauff#4	1.31	96.7	316
7	Sonay Kartal#124	1.29	96.1	123
8	Mirra Andreeva#5	1.28	95.4	181
9	Jessica Pegula#3	1.17	94.7	327
10	MV Marketa Vondrousova#140	1.15	94.1	145
11	Belinda Bencic#14	1.12	93.4	222
12	Iva Jovic#16	1.09	92.8	145
13	Elina Svitolina#9	1.08	92.1	208
14	Naomi Osaka#13	1.01	91.4	145
15	Madison Keys#23	0.98	90.8	228
16	Sara Bejlek#38	0.93	90.1	125
17	VA Victoria Azarenka	0.88	89.5	150
18	Amanda Anisimova#10	0.87	88.8	183
19	Paula Badosa#84	0.82	88.2	203
20	Karolina Muchova#6	0.81	87.5	173
21	Danielle Collins	0.76	86.8	167
22	OJ Ons Jabeur	0.75	86.2	181
23	Diana Shnaider#17	0.74	85.5	202
24	CW Caroline Wozniacki	0.73	84.9	33
25	Qinwen Zheng	0.70	84.2	213
26	Barbora Krejcikova#26	0.68	83.6	193
27	Maya Joint#75	0.64	82.9	193
28	Jelena Ostapenko#29	0.62	82.2	241
29	Marie Bouzkova#25	0.62	81.6	235
30	Ekaterina Alexandrova#19	0.61	80.9	271
31	Elise Mertens#24	0.60	80.3	250
32	Marta Kostyuk#11	0.57	79.6	236
33	Emma Raducanu#49	0.54	78.9	156
34	Emma Navarro#28	0.54	78.3	210
35	OD Olga Danilovic	0.53	77.6	118
36	Clara Tauson#30	0.52	77.0	192
37	PK Petra Kvitova	0.50	76.3	103
38	Anna Kalinskaya#21	0.50	75.7	201
39	Sorana Cirstea#18	0.49	75.0	221
40	Liudmila Samsonova#55	0.48	74.3	254
41	Katie Volynets#91	0.48	73.7	206
42	Caty McNally	0.47	73.0	154
43	Maria Sakkari#33	0.46	72.4	266
44	Hailey Baptiste#32	0.45	71.7	169
45	Leylah Fernandez#34	0.44	71.1	246
46	Daria Kasatkina#61	0.44	70.4	276
47	Alexandra Eala#20	0.44	69.7	199
48	McCartney Kessler#48	0.44	69.1	153
49	Jessica Bouzas Maneiro#63	0.43	68.4	170
50	Katerina Siniakova#37	0.43	67.8	221

How this is calculated

Minimum 30 matches with a recorded score. Below that the figure is noise and publishing it would be faking precision. Each family of metrics carries its own counter — 200 matches is not 200 tiebreaks.
Window. Five years of results. These rows need only the scoreline, which exists far further back than serve statistics do.
One division at a time. A player belongs to the Challenger/ITF division when more than half of their matches since 2024 are played there. Mixing the two ranks schedules rather than players: the raw list of closers was headed by an ITF player at 100% over twenty matches.
Not a betting signal. It describes a player, not a price. Our own prediction engine is measured against the market and loses: 0.632 log loss against 0.593.

Leader

Iga Swiatek

2.22 games per set

Average: 0.24
Std. dev.: 0.53
Leader sits at: 3.7σ
Range: -1.82 … 2.22

153 players

#	Player	Value	Pctl	Sample
1	Iga Swiatek#8	2.22	100.0	357
2	SH Simona Halep	1.54	99.3	70
3	ER Elena Ruse	1.53	98.7	73
4	Aryna Sabalenka#1	1.48	98.0	325
5	Elena Rybakina#2	1.35	97.4	305
6	Coco Gauff#4	1.31	96.7	316
7	Sonay Kartal#124	1.29	96.1	123
8	Mirra Andreeva#5	1.28	95.4	181
9	Jessica Pegula#3	1.17	94.7	327
10	MV Marketa Vondrousova#140	1.15	94.1	145
11	Belinda Bencic#14	1.12	93.4	222
12	Iva Jovic#16	1.09	92.8	145
13	Elina Svitolina#9	1.08	92.1	208
14	Naomi Osaka#13	1.01	91.4	145
15	Madison Keys#23	0.98	90.8	228
16	Sara Bejlek#38	0.93	90.1	125
17	VA Victoria Azarenka	0.88	89.5	150
18	Amanda Anisimova#10	0.87	88.8	183
19	Paula Badosa#84	0.82	88.2	203
20	Karolina Muchova#6	0.81	87.5	173
21	Danielle Collins	0.76	86.8	167
22	OJ Ons Jabeur	0.75	86.2	181
23	Diana Shnaider#17	0.74	85.5	202
24	CW Caroline Wozniacki	0.73	84.9	33
25	Qinwen Zheng	0.70	84.2	213
26	Barbora Krejcikova#26	0.68	83.6	193
27	Maya Joint#75	0.64	82.9	193
28	Jelena Ostapenko#29	0.62	82.2	241
29	Marie Bouzkova#25	0.62	81.6	235
30	Ekaterina Alexandrova#19	0.61	80.9	271
31	Elise Mertens#24	0.60	80.3	250
32	Marta Kostyuk#11	0.57	79.6	236
33	Emma Raducanu#49	0.54	78.9	156
34	Emma Navarro#28	0.54	78.3	210
35	OD Olga Danilovic	0.53	77.6	118
36	Clara Tauson#30	0.52	77.0	192
37	PK Petra Kvitova	0.50	76.3	103
38	Anna Kalinskaya#21	0.50	75.7	201
39	Sorana Cirstea#18	0.49	75.0	221
40	Liudmila Samsonova#55	0.48	74.3	254
41	Katie Volynets#91	0.48	73.7	206
42	Caty McNally	0.47	73.0	154
43	Maria Sakkari#33	0.46	72.4	266
44	Hailey Baptiste#32	0.45	71.7	169
45	Leylah Fernandez#34	0.44	71.1	246
46	Daria Kasatkina#61	0.44	70.4	276
47	Alexandra Eala#20	0.44	69.7	199
48	McCartney Kessler#48	0.44	69.1	153
49	Jessica Bouzas Maneiro#63	0.43	68.4	170
50	Katerina Siniakova#37	0.43	67.8	221

How this is calculated

Minimum 30 matches with a recorded score. Below that the figure is noise and publishing it would be faking precision. Each family of metrics carries its own counter — 200 matches is not 200 tiebreaks.
Window. Five years of results. These rows need only the scoreline, which exists far further back than serve statistics do.
One division at a time. A player belongs to the Challenger/ITF division when more than half of their matches since 2024 are played there. Mixing the two ranks schedules rather than players: the raw list of closers was headed by an ITF player at 100% over twenty matches.
Not a betting signal. It describes a player, not a price. Our own prediction engine is measured against the market and loses: 0.632 log loss against 0.593.