Roger Federer won his 17th consecutive match at the Swiss Indoors on Thursday, dispatching Jan-Lennard Struff 6-3 7-5 to reach the quarter-finals.

The top seed, unbeaten in Basel since 2013, is an eight-time winner of his home event and will next play Frenchman Gilles Simon, who defeated Latvia's Ernests Gulbis 7-6 (7/4) 7-6 (7/0).