Katie Boulter is through to a first WTA 500 semi-final after beating Croatia's Donna Vekic in straight sets at the San Diego Open.
Former Wimbledon champion Petra Kvitova and Donna Vekic both had to come through two matches on Saturday to secure a place in the final of WTA Bett1Open.
Wimbledon champion Elena Rybakina suffered an unexpected early exit from the WTA Bett1Open after she was beaten 6-7 (1) 6-3 6-4 by Croatian Donna Vekic in Berlin.
Aryna Sabalenka will take on surprise package Magda Linette in the semi-finals of the Australian Open.
Aryna Sabalenka gave a statement of her intent at the Australian Open by powering past Belinda Bencic to reach the quarter-finals.