The darkness postponed the decision for Mikael Ymer in the first round against Daniel Altmaier.
When the third set started at 2 pm on Tuesday, Ymer got off to a bad start and was at most 5-2 behind.
When it looked like going to a fourth set, the 23-year-old turned around and won five straight games, and won.
The set numbers were written to 6-3, 7-5, 7-5- The 88-ranked Swede has never before passed the second round, where tough opposition now awaits.
13-ranked (10-ranked in Wimbledon) Jannik Sinner from Italy will stand for the opposition.
He defeated multiple grand slam winner Stan Wawrinka in the first round.
CLIP: Mikael Ymer knocked out Stefanos Tsitsipas in French Open (May 28)
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Mikael Ymer and Stefanos Tsitsipas.
Photo: Bildbyrån