Paris - Rafael Nadal has won 37 completed sets in a row at the French Open heading into his quarter-final against Diego Schwartzman.
Top-ranked Nadal enters Wednesday's match bidding to reach his 11th semi-final at Roland Garros.
The 11th-seeded Schwartzman has never made it to the final four at any Grand Slam tournament.
Two past US Open champions meet in the other men's quarter-final: No 3 Marin Cilic against No 5 Juan Martin del Potro.