WTA Toronto: Anisimova books spot in quarter-finals as Kalinskaya retires injured

American Amanda Anisimova advanced to the quarter-finals of the National Bank Open when Russian Anna Kalinskaya, the No 10 seed, retired with injury at the Aviva Centre.

Anisimova, ranked No 132, led 6-2 when Kalinskaya, ranked No 17, pulled out at the Aviva Centre on Friday evening.

The 22-year-old American will play the winner of the match between Katie Boulter and Belarusian Aryna Sabalenka, the second seed, next.

Amanda Anisimova won against Caroline Dolehide (6-1, 6-4) and Russian Daria Kasatkina, the No 5 seed (6-4, 6-3) earlier in the tournament.

In the previous rounds of the Rogers Cup, the Russian beat American qualifier Louisa Chirico (6-2, 6-3) and Ukrainian Lesia Tsurenko (6-2, 6-2).

Toronto WTA 1000, other last-16 results (Aviva Centre, hard, USD 3.211.715, most recent results first):

• Katie Boulter vs. Aryna Sabalenka
• Coco Gauff vs. Diana Shnaider
• Elise Mertens vs. Liudmila Samsonova
• Victoria Azarenka vs. Peyton Stearns
• Jessica Pegula (3) beat Ashlyn Krueger (Q): 6-2, 6-4
• Taylor Townsend (LL) beat Jelena Ostapenko (4): 6-2, 6-1
• Emma Navarro (8) beat Marta Kostyuk (11): 7-5, 7-5