Britain's world number two Andy Murray faces big-serving American John Isner on Sunday for a place in the French Open quarter-finals.
Murray, 29, will be seeking a repeat of the form that saw him overcome Ivo Karlovic in the third round on Friday.
But Isner is a much stronger all-round player than Karlovic and has pushed Murray hard in previous meetings.
The match is scheduled third on Court Suzanne Lenglen but could be delayed because of rain.
The American, seeded 15th, accepts Murray would have benefitted from his match against Karlovic.