Italy's Jannik Sinner stormed into his maiden semifinals at the Wimbledon here by beating unseeded Roman Safiullin in four sets in a quarterfinal clash.

The Italian eighth seed survived a fright when he lost the second set before fighting back to win the next two sets, emerging a 6-3, 3-6, 6-2, 6-2 victory in two hours and 14 minutes at No.1 Court.