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.
Belarusian top seed Aryna Sabalenka overcame British qualifier Katie Boulter in straight sets to reach the last 16 of the China Open on Tuesday evening.
Katie Boulter reached her first WTA Tour final by beating countrywoman Heather Watson at the Rothesay Open in Nottingham.