Austin Open: Collins advances to semi-finals, Kostyuk next

American Danielle Collins, the No 4 seed, beat Russian Anna Kalinskaya 3-6, 6-2, 6-1 to reach the semi-finals of the Austin Open at the Westwood Country Club on Friday.

Collins, ranked No 38, will face Ukrainian Marta Kostyuk, the No 8 seed, next.

The American edged out Pole Magdalena Frech (6-7 (7), 6-2, 6-4) and won against Catherine McNally (6-1, 6-1) ahead of her victory.

Kalinskaya, ranked No 67, won against Japanese lucky loser Nao Hibino (6-4, 3-6, 6-2) and American lucky loser Coco Vandeweghe (6-3, 6-1).

Austin WTA 250, other quarter-finals results (Westwood Country Club, hard, USD 259.303, most recent results first):

• Varvara Gracheva vs. Sloane Stephens
• Katie Volynets beat Peyton Stearns (WC): 7-5, 6-3
• Marta Kostyuk beat Anna-Lena Friedsam: 7-6 (6), 6-2