Tallon Griekspoor saved four match points in upsetting top seed Daniil Medvedev 2-6, 7-6 (7), 7-5 in the quarterfinals at the Dubai Tennis Championships on Thursday.

The Dutchman advanced to his eighth career ATP Tour semifinal (3-4 record) in knocking off Russia’s Medvedev, the 2023 winner of this event who posted 15 aces on this day. Griekspoor saved 11 of 14 break points while converting 2 of 7.

Griekspoor next faces fourth-seeded Stefanos Tsitsipas of Greece, a 7-6 (5), 1-6, 6-4 winner over Italy’s Matteo Berrettini. Canada’s Felix Auger-Aliassime defeated Croatia’s Marin Cilic 6-4, 3-6, 6-2 to advance to the semifinals against French qualifier Quentin Halys, who also went three sets to hold off Italian lucky loser Luca Nardi 2-6, 6-3, 7-6 (5).

–Field Level Media