Stepanek through to last eight
Radek Stepanek and Lukas Rosol reached the last eight of the Erste Bank Open in Vienna but sixth seed Gael Monfils fell at the first hurdle.
The Czech Republic's fifth-seeded Stepanek reached his second quarter-final of the season by surviving a wobble to beat Lukas Lacko over three gruelling sets.
Stepanek had missed his first match point at 5-4 but would close out a 7-6 (7/4) 5-7 7-6 (7/5) win with his 15th ace of the match.
Second seed Tommy Haas or qualifier Miloslav Mecir are up next while Czech right-hander Rosol can plan for a meeting with either the unfancied Ruben Bemelmans or fourth seed Philipp Kohlschreiber.
Eight seed Rosol hit 10 aces past Bosnian Mirza Basic on his way to a 6-3 7-5 win.
French hopeful Monfils endured a miserable evening in an outstanding first-round clash as Jaroslav Popsipil pulled off a 7-6 (7/0) 7-5 win in just under two hours.
Lukasz Kubot did enough to book a second-round meeting with third seed Fabio Fognini. The Pole recovered from going 3-0 behind in the second set to beat Germany's Florian Mayer 7-6 (7/1) 6-4.
In the doubles, British hopeful Jamie Murray and his Australian partner John Peers progressed to the second round with a 6-0 4-6 10-6 victory over Daniel Gimeno-Traver and Jan Hajek.