Liudmila Samsonova def. Marta Kostyuk
4-6 6-2 7-5
Liudmila Samsonova defeated Marta Kostyuk 4-6 6-2 7-5 in the 2026 Guadalajara Open quarterfinal on hard courts on September 17, 2026.
Match Information
Match Statistics
| Stat | Liudmila Samsonova | Marta Kostyuk |
|---|---|---|
| Serving | ||
AcesServes that land in and are not touched by the returner. | 0 | 3 |
Double faultsService points lost by missing both first and second serve. | 6 | 6 |
First serve %Percentage of service points where the first serve landed in. | 75.2% | 56.3% |
First serve points won %Percentage of points won after making a first serve. | 58.2% | 70.7% |
Second serve points won %Percentage of second-serve points won, including points lost through double faults. | 57.7% | 31.1% |
Break points saved %Percentage of break points won by the server. | 55.6% | 53.8% |
Service points won %Percentage of all points won while serving. | 58.1% | 53.4% |
| Returning | ||
Break points converted %Percentage of break-point chances won by the returner. | 46.2% | 44.4% |
Return points won %Percentage of all points won while returning. | 46.6% | 41.9% |
| Overall | ||
Total points won %Percentage of all completed points won. | 52.4% | 47.6% |
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. | +1.2 | -3.5 |
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. | +3.5 | -1.2 |
* 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.
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Player Comparison
| Field | Liudmila Samsonova | Marta Kostyuk |
|---|---|---|
| Country | RUS | UKR |
| Birth date | Nov 11, 1998 | Jun 28, 2002 |
| Age | 27 | 24 |
| Height | 182 cm | 175 cm |
| Handedness | Right-Handed | Right-Handed |
| Backhand style | Two-Handed Backhand | Two-Handed Backhand |
| Ranking (entering) | 50 | 10 |
| Ranking points (entering) | 1,099 | 3,980 |
| Elo (entering) | 1,824 | 2,082 |
| Current career W-L | 168–138 | 162–118 |
| Current career earnings | $9,310,514 | $11,168,749 |
Path
Liudmila Samsonova's path
| Opponent | Score | W-L | H2H | Match Data | Date | Round |
|---|---|---|---|---|---|---|
| Kayla Day | 7-6(4) 2-6 7-6(5) | W | H2H | Match data | Sep 17, 2026 | R16 |
| Elsa Jacquemot | 7-6(6) 6-2 | W | H2H | Match data | Sep 15, 2026 | R32 |
Liudmila Samsonova's next match
| Opponent | Score | W-L | H2H | Match Data | Date | Round |
|---|---|---|---|---|---|---|
| Peyton Stearns | 6-7(7) 2-6 | L | H2H | Match data | Sep 19, 2026 | SF |
Marta Kostyuk's path
| Opponent | Score | W-L | H2H | Match Data | Date | Round |
|---|---|---|---|---|---|---|
| Taylor Townsend | (w/o) | W | H2H | Match data | Sep 16, 2026 | R16 |