Quarterfinal matches were held on Friday, May 2, at the clay court `Challenger 175` tournament in Aix-en-Provence, France.
Borna Ćorić (Croatia) defeated Mariano Navone (Argentina) 7/5, 6/4
Ignacio Buse (Peru) defeated Reilly Opelka (USA) 6/7(4), 3/2, retired (Opelka)
Stan Wawrinka (Switzerland) defeated Nishesh Basavareddy (USA) 7/6(8), 6/3
Borna Gojo (Croatia) defeated Valentin Vacherot (Monaco) 6/2, 6/3
Marcus Prine