World No. 56 Marius Copil, the 2018 finalist, got the better of Stan Wawrinka 3-6, 7-6(5), 6-4 over one hour and 47 minutes in the Sofia Open first round.
« I think it was a really tough match, » said Wawrinka, who clinched the first set in 23 minutes. « I played really well in the first set. In the second set, I had some chances. He was a little bit better than in the beginning. I made a few mistakes and the same [happened] in the third set. He played well. Sometimes you lose tough matches. You need to keep practising [and] you need to keep fighting. Tonight, it was not my night. »