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,

Griekspoor came from behind to triumph 2-6 7-6 (9-7) 7-5 over the Russian at the Dubai Tennis Championships on Thursday. Medvedev had four match points across Griekspoor's final two service games of the second set, yet each one was clawed back.

World no. 6 Daniil Medvedev experienced another blow in Dubai. The former champion wasted four match points versus Tallon Griekspoor in the quarter-final and fell 2-6, 7-6, 7-5 in two hours and 36 minutes!

Tallon Griekspoor staged a grand recovery, saving four match-points, before stunning top seed Daniil Medvedev 2-6, 7-6(7), 7-5 to reach the semi-finals of the Dubai Championships on Thursday.

Former world number one Daniil Medvedev crashed out of the Dubai Championships on Thursday, squandering four match points before losing a bad-tempered quarter-final to Tallon Griekspoor of the Netherlands.