PARIS — Roger Federer’s return to French Open clay is going so smoothly he still has not dropped a set in reaching the quarterfinals.
The 20-time Grand Slam winner eased through with a 6-2, 6-3, 6-3 win Sunday against unseeded Argentine Leonardo Mayer.
With temperatures reaching 88 Fahrenheit (31 Celsius) on a sun-soaked center court, the third-seeded Federer did not face a break point in beating Mayer for the fourth time in four meetings.
Federer won his only French Open in 2009 and remains on course for a semifinal showdown with Rafael Nadal, the defending champion at Roland Garros.