Frenchman Benoit lost his temper in the third game of the second set when top seed Tsitsipas halted the match to attend to a broken shoe lace.
American swimmer Michael Phelps, the most decorated Olympian of all time, was suspended for six months by USA Swimming on Monday following his recent arrest on a drunken driving charge.
IMAGES from matches played on Day 4 of the French Open at Roland Garros on Wednesday
Andy Murray clinched the Vienna Open title on Sunday with a 5-7, 6-2, 7-5 victory over David Ferrer, one of the Briton's main rivals in the battle to qualify for the ATP World Tour Finals.