2025 Open Internacional de San Sebastián
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| 2025 Open Internacional de San Sebastián | |
|---|---|
| Date | 8–13 September 2025 |
| Edition | 2nd |
| Category | WTA 125 tournaments |
| Prize money | $115,000 |
| Surface | Clay / Outdoor |
| Location | San Sebastián, Spain |
| Champions | |
| Singles | |
 Oksana Selekhmeteva | |
| Doubles | |
Anastasia Tikhonova /  Tara Würth | |
The 2025 Open Internacional de San Sebastián was a professional tennis tournament played on outdoor clay courts. It was the second edition of the tournament (the first since 2022) and part of the 2025 WTA 125 tournaments (upgraded from ITF status in 2022). It took place in San Sebastián, Spain between 8 and 13 September 2025.[1]
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 EGY |
Mayar Sherif | 102 | 1 |
 CZE |
Sára Bejlek | 111 | 2 |
 ROU |
Anca Todoni | 112 | 3 |
 LAT |
Darja Semeņistaja | 115 | 4 |
 AUT |
Julia Grabher | 116 | 5 |
 ESP |
Leyre Romero Gormaz | 123 | 6 |
 NED |
Arantxa Rus | 131 | 7 |
 LIE |
Kathinka von Deichmann | 157 | 8 |
- 1 Rankings are as of 25 August 2025.
Other entrants
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Withdrawals
Andrea Lázaro García → replaced by 
Tina Smith
Doubles entrants
Seeds
| Country | Player | Country | Player | Rank | Seed |
|---|---|---|---|---|---|
 ITA |
Angelica Moratelli | LAT |
Darja Semeņistaja | 198 | 1 |
| Anastasia Tikhonova | CRO |
Tara Würth | 295 | 2 |
- Rankings as of 25 August 2025.
Other entrants
The following pair received a wildcard into the doubles main draw:
