Roger Federer was given a fright before reaching the semi-final of the inaugural Istanbul Open on Friday. The top seed beat Daniel Gimeno-Traver 7-6, 6-7, 6-3 but needed two hours 28 minutes to set up a semi-final against the eighth seed Diego Schwartzman.
Schwartzman won only seven points in a dreadful opening set against the fourth seed Santiago Giraldo but triumphed 0-6, 6-2, 6-2.
The second seed Grigor Dmitrov eased into the semi-finals with a straightforward defeat of Ivan Dodig and will face Pablo Cuevas.
Organisers will no doubt be hoping for a Federer-Dimitrov final on Sunday as the tournament tries to establish itself on the ATP Tour.