World number one Novak Djokovic lost the first set to Roberto Bautista Agut before rain returned to again delay play at the French Open.
Spain's Bautista Agut, the 14th seed, led Serb Djokovic 6-3 when their fourth-round match was halted in Paris.
Serena Williams is scheduled to play Elina Svitolina in the following match, before Andy Murray faces Richard Gasquet in the first quarter-final.
Monday saw the first washout at Roland Garros since 2000.