Top seed Novak Djokovic created a piece of French Open history by becoming the first man to reach a 10th consecutive quarter-final after a routine win over Germany's Jan-Lennard Struff.
The 32-year-old Serb, aiming to hold all four Grand Slams at the same time, won 6-3 6-2 6-2 in one hour 33 minutes.
Djokovic has not dropped a set at this year's Roland Garros.
German fifth seed Alexander Zverev or Italian ninth seed Fabio Fognini await in the last eight.
They meet in the last 16 later on Monday.
After winning the Wimbledon, US Open and Australian Open titles, Djokovic is aiming to hold all four majors at the same time by claiming the French Open for a second time.