Top-seeded Roger Federer gave a demonstration of his service skills as he beat Jarkko Nieminen 6-2, 7-5 on Wednesday to reach the quarter-finals of the inaugural Istanbul Open clay-court tournament.
Federer never faced a break point and won 93% of his first serves. He also served nine aces while Nieminen had none.
Federer will next play Daniel Gimeno-Traver, who upset sixth-seeded Mikhail Kukushkin 6-3, 6-3.
Also, fourth-seeded Santiago Giraldo beat wild card entry Andrey Rublev 6-4, 1-6, 6-3 to reach the last eight.
Giraldo struggled at times against Rublev, with both players dropping their serve three times.