PARIS - Matteo Arnaldi clawed his way back from the brink to become the third Italian man in the French Open quarter-finals, outlasting American Frances Tiafoe 7-6(5) 6-7(5) 3-6 7-6(3) 6-4 in a five-hour, 26-minute epic on Court Suzanne-Lenglen.
Trailing 4-1 in the fourth set, the world number 104 summoned a final surge and prevailed on his third match point.
"It's a dream to be here," said Arnaldi. "We live to play these matches."
Arnaldi has now spent 17 hours and 42 minutes on court in Paris - the most by any player reaching the quarter-finals of a Grand Slam since the ATP Tour began recording match times in 1991.
He will next face compatriot Matteo Berrettini, joining Flavio Cobolli in the last eight after Jannik Sinner's surprise second-round exit.