San Diego Open: Badosa books spot in quarter-finals, Collins next

Spaniard Paula Badosa, the second seed, advanced to the quarter-finals of the San Diego Open by defeating American qualifier Louisa Chirico 6-0, 6-3 at the Barnes Tennis Centre on Friday night.

Badosa, ranked No 4, will face American Danielle Collins next.

Chirico, ranked No 196, edged out Alison Riske-Amritraj (1-6, 7-5, 7-6 (5)) in the previous round.

San Diego WTA 500, other second-round results (Barnes Tennis Centre, hard, USD 757.900, most recent results first):

• Aryna Sabalenka (3) beat Sloane Stephens (WC): 1-6, 6-3, 6-2
• Madison Keys beat Daria Kasatkina (8): 6-4, 6-3
• Coco Gauff (6) beat Bianca Andreescu: 6-4, 4-6, 6-3
• Iga Swiatek (1) beat Qinwen Zheng (LL): 6-4, 4-6, 6-1
• Jessica Pegula (4) beat Coco Vandeweghe (WC): 6-3, 6-1
• Danielle Collins beat Martina Trevisan: 6-2, 6-4
• Donna Vekic (Q) beat Karolina Pliskova: 6-3, 6-2