Johanna Konta of Great Britain celebrates against Marketa Vondrousova of Czech Republic in their Women's Single Quarterfinal Match during Day Six of the International BNL d'Italia at Foro Italico on May 17
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The Briton, who turned 28 on Friday, followed up on a Thursday double-header, where she beat Sloane Stephens and then Venus Williams, by overcoming Vondrousova 6-3 3-6 6-1.
Konta broke Vondrousova twice in the opening set, but the Czech bounced back with two breaks of her own to level up at one-set all.
But it was Konta who blitzed the decider, breaking three times to set up a last-four meeting with Kiki Bertens, the benefactor of Naomi Osaka’s withdrawal before their quarter-final.
The other semi-final will see Karolina Pliskova take on Maria Sakkari.
Pliskova recovered from a set down to beat Victoria Azarenka 6-7(5) 6-2 6-2 earlier on Friday, while Sakkari bounced back to beat Kristina Mladenovic 5-7 6-3 6-0.
Afternoon Session, Day 5
First Session, Day 5
Second Session, Day 5