Dominic Thiem advanced to his second Grand Slam final of 2020, digging out a win over third seeded Russian Daniil Medvedev 6-2 7-6(7) 7-6(5) at the U.S. Open on Friday.
Thiem seized the early momentum inside Arthur Ashe Stadium, handily carrying the first set without dropping a single first-serve point.
But a double-fault and a forehand error saw him hand Medvedev the break and the early lead in the second set.
The Australian Open runner-up spent the remainder of the frame playing catch-up, converting on a critical break to level scores 5-5 before the 24-year-old Russian dragged it into a tie-break.
The 27-year-old Austrian, who had a trainer examine his ankle before the third set, slipped and fell twice in the match, unfurling a string of frustrated exclamations in the second incident.
But he regained his cool to survive yet another tie-break to clinch the affair with a power forehand and a roar.
“I played my best tennis then towards the end of the sets,” said Thiem, who is gunning for a maiden Grand Slam title.
“Both tie-breaks were amazing. Tie-breaks are mentally a tough thing. I don’t like them at all, to be honest.
“I’m really happy to be through. It was a great semi-final,” he added.
Thiem will take on Germany’s Alexander Zverev in Sunday’s U.S. Open final.