Roger Federer was forced to come through a final set as he beat Daniel Gimeno-Traver to reach the semi-finals of the Istanbul Open.
The top seed emerged unscathed after defeating the Spaniard 7-6(3) 6-7(5) 6-3 in just under two hours and will now face Diego Schwartzman in the last four after he overcame Santiago Giraldo 0-6 6-2 6-2.
Federer, who has already won titles in Dubai and Brisbane this season and has been a losing finalist at Indian Wells, moved ahead in the match after taking the opening set in a tiebreak.
Gimeno-Traver stormed into a 5-2 lead in the second set, only for Federer to force another tiebreak. However, Federer failed to capitalise on his 2-0 advantage in the tiebreak as Gimeno-Traver took it 7-5 to send the match into a final set.
Federer then secured a break in the eighth game of the third and final set which enabled him to go on and secure a spot in the semi-finals.
On Thursday, Federer took time to explore the city of Istanbul, but despite the warm temperatures then and during his match on Friday against Gimeno-Traver, he was glad to come through a tough battle.
"Just because it’s nice weather doesn’t mean you’re going to play nice," Federer commented after his quarter-final victory.
"I wish it was like that, but it’s not as simple as that. It was a good fight today, so I’m happy I was able to find a way."