Watched the first two sets and credit to both players to play some decent tennis regarding the conditions (late hour, almost nobody in the audience...)
In the first set Greul wasn't able to hit 2 BH back-to-back in a rallye, and Sergeyev was unbreakable. In the second set Greul raised his level but Sergeyev maintained his form until 6/4 *5/4 where he became a little bit tight, without 1st serves, and frustrated. Thought match was over when Greul won the 2nd set, but good that Sergeyev won, his game isn't crazy but quite solid. He will play his 79th match of the season today, simple amazing as we are only in July !!
Andreas Haider-Maurer AUT  beat Michael Lammer SUI  6-3 6-3
Ivan Sergeyev UKR beat Jérôme Inzerillo FRA [Q] 6-1 6-4
Gianluca Naso ITA  beat Andrej Martin SVK 6-4 7-6 (5)
Sergio Gutierrez-Ferrol ESP beat Arnau Brugues-Davi ESP  4-6 6-1 6-4