Sloane Stephens

Rank: 209Elo: 1596Age: 33

0 - 2

Head-to-Head

Marta Kostyuk

Rank: 11Elo: 2027Age: 24

Match Prediction

Sloane

Stephens

Overall: 1596

Hard: 1472

Marta

Kostyuk

Overall: 2027

Hard: 1808

String Tension Elo Prediction:

Kostyuk 89.2%

-830

ELO Comparison

Match History (2 Matches)

Showing 1 to 2 of 2 matches

U.S. OpenSep 2, 2026

2nd Round · Hard

S. Stephens

M. Kostyuk

Cincinnati OpenAug 18, 2026

3rd Round · Hard

S. Stephens

M. Kostyuk

Date	Tournament	Winner	Score
Sep 2, 2026	U.S. Open\| 2nd Round Hard	Marta Kostyuk	67 15
Aug 18, 2026	Cincinnati Open\| 3rd Round Hard	Marta Kostyuk	77 55

Recent Matches

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Detailed Stats Comparison

2026 Season Stats

Sloane Stephens

Marta Kostyuk

Sloane Stephens

Season

Marta Kostyuk

9–13

41% win

35–10

78% win

Serve

0.9

Aces/Match

4.0

2.2

Double Faults/Match

4.2

67%

1st Serve %

57%

58%

1st Serve Won %

71%

48%

2nd Serve Won %

48%

Return

40%

Return Points Won %

48%

2.7/6.0 (44%)

Break Point Offense

4.6/9.4 (49%)

4.6/8.3 (56%)

Break Point Defense

4.2/6.9 (61%)

Season stats are from 2026.