Marta Kostyuk def. Sloane Stephens
7-5 7-5
Marta Kostyuk defeated Sloane Stephens 7-5 7-5 in the 2026 Cincinnati Open third round on hard courts on August 18, 2026.
Match Information
Match Statistics
| Stat | Marta Kostyuk | Sloane Stephens |
|---|---|---|
| Serving | ||
AcesServes that land in and are not touched by the returner. | 7 | 0 |
Double faultsService points lost by missing both first and second serve. | 7 | 2 |
First serve %Percentage of service points where the first serve landed in. | 51.5% | 62.5% |
First serve points won %Percentage of points won after making a first serve. | 73.5% | 55.0% |
Second serve points won %Percentage of second-serve points won, including points lost through double faults. | 46.9% | 41.7% |
Break points saved %Percentage of break points won by the server. | 55.6% | 37.5% |
Service points won %Percentage of all points won while serving. | 60.6% | 50.0% |
| Returning | ||
Break points converted %Percentage of break-point chances won by the returner. | 62.5% | 44.4% |
Return points won %Percentage of all points won while returning. | 50.0% | 39.4% |
| Overall | ||
Total points won %Percentage of all completed points won. | 55.4% | 44.6% |
Match Serve+This match’s service points won percentage minus the tour’s season average, in percentage points. Zero is average; +5 means five points above average. Match-weighted available stats; no opponent adjustment. | +3.7 | -6.9 |
Match Return+This match’s return points won percentage minus the tour’s season average, in percentage points. Zero is average; +5 means five points above average. Match-weighted available stats; no opponent adjustment. | +6.9 | -3.7 |
* Match Serve+ and Match Return+ compare this match with the WTA 2026 average from available match stats. Zero is average; +5 means five percentage points above average. No opponent adjustment.
Win Probability
How the market's view of each player's chances changed through the match.
Focus the chart and use the left and right arrow keys to inspect probability updates.
Player Comparison
| Field | Marta Kostyuk | Sloane Stephens |
|---|---|---|
| Country | UKR | USA |
| Birth date | Jun 28, 2002 | Mar 20, 1993 |
| Age | 24 | 33 |
| Height | 175 cm | 170 cm |
| Handedness | Right-Handed | Right-Handed |
| Backhand style | Two-Handed Backhand | Two-Handed Backhand |
| Ranking (entering) | 11 | 240 |
| Ranking points (entering) | 3,830 | 310 |
| Elo (entering) | 2,087 | 1,699 |
| Current career W-L | 162–118 | 305–250 |
| Current career earnings | $11,168,749 | $19,656,719 |
Path
Marta Kostyuk's path
| Opponent | Score | W-L | H2H | Match Data | Date | Round |
|---|---|---|---|---|---|---|
| Sofia Kenin | 4-6 6-3 7-5 | W | H2H | Match data | Aug 16, 2026 | R64 |
Marta Kostyuk's next match
| Opponent | Score | W-L | H2H | Match Data | Date | Round |
|---|---|---|---|---|---|---|
| Mirra Andreeva | 4-6 6-0 6-2 | W | H2H | Match data | Aug 19, 2026 | R16 |
Sloane Stephens's path
| Opponent | Score | W-L | H2H | Match Data | Date | Round |
|---|---|---|---|---|---|---|
| Anastasia Potapova | 6-2 6-4 | W | H2H | Match data | Aug 16, 2026 | R64 |
| Sinja Kraus | 7-5 6-3 | W | H2H | Match data | Aug 14, 2026 | R128 |