Stefanos Tsitsipas advanced to the third round after another slugfest for the No. 4 seed at Roland Garros.
The 2021 French Open runner-up defeated Czech qualifier Zdenek Kolar 6-3, 7-6 (8), 6-7 (3), 7-6 (7) at Court Suzanne Lenglen.
The 134th-ranked Kolar had four set points but couldn't force a fifth set as Tsitsipas fought back to even the last tiebreaker at 6-6 before closing out the match just past the 4-hour mark.
Tsitsipas went past midnight in his marathon five-set win over Lorenzo Musetti in the first round, a year after blowing a two-set lead in the final against Novak Djokovic.
No. 11 Jannik Sinner advanced by beating Roberto Carballes Baena 3-6, 6-4, 6-4, 6-3.
This is the first time since 2009 that the top 12 men's seeds at Roland Garros all reached the third round.