Ukrainian Anhelina Kalinina reached the last 16 of the Birmingham Open when No 4 seed Katie Boulter retired at Edgbaston Priory Club.
Kalinina, ranked No 47, led 6-3 when Boulter, ranked No 31, pulled out on Tuesday evening at Edgbaston Priory Club.
The Ukrainian will play Kazakh Yulia Putintseva next.
Birmingham WTA 250, other last-32 results (Edgbaston Priory Club, grass, USD 267.082, most recent results first):
- Yulia Putintseva beat Clara Burel: 6-3, 6-4
- Caroline Dolehide (LL) beat Karolina Pliskova: 2-6, 6-3, 7-6 (5)
- Diana Shnaider beat Amelia Rajecki (Q): 7-5, 6-3
- Harriet Dart (WC) beat Moyuka Uchijima (Q): 6-3, 6-3
- Marie Bouzkova (8) beat Heather Watson (WC): 3-6, 6-4, 7-5
- Barbora Krejcikova (2) beat Daria Saville (Q): 6-1, 7-6 (5)
- Elise Mertens (5) beat Caroline Wozniacki (WC): 6-4, 6-1
- Leylah Fernandez (6) beat Sara Sorribes Tormo: 6-1, 6-1
- Viktorija Golubic (Q) beat Camila Osorio (Q): 6-4, 1-6, 6-3
- Ajla Tomljanovic beat Anna Blinkova: 6-2, 6-1
- Lin Zhu beat Sorana Cirstea (3): 7-6 (2), 6-2
- Anastasia Potapova (7) beat Elina Avanesyan (Q): 6-4, 6-4
- Elisabetta Cocciaretto beat Jelena Ostapenko (1): 6-3, 6-3
- Sloane Stephens (WC) beat Yue Yuan: 6-3, 6-3
- Lucia Bronzetti beat Magdalena Frech: 2-6, 6-3, 6-4