VIENNA - The 213th-ranked Jaroslav Pospisil of Czech Republic stunned sixth-seeded Gael Monfils of France 7-6 (0), 7-5 to win his first match on ATP level at the Erste Bank Open on Wednesday, while seeded Czech players Radek Stepanek and Lukas Rosol advanced to the quarterfinals.
The 32-year-old Pospisil, who usually competes on the lower-ranked Challenger circuit, lost in the final qualifying round Monday but replaced Marinko Matosevic after the Australian withdrew with a shoulder injury.
"This is an amazing feeling," said Pospisil, who had lost his previous six main-draw matches.
"For sure Monfils wasn't at his best today," said Pospisil, who will play Dominic Thiem of Austria in the second round. "He arrived late from his Asia trip and I have been training here since Friday. That was a huge advantage for me."
In the opening set, Monfils held off four break chances while serving at 5-4 down but failed to score a point in the tiebreaker.
The 31st-ranked Frenchman, a former world No. 7, battled back from a break down to level at 4-4 in the second set but dropped his serve again at 5-5. Pospisil served out the match without conceding a point.
Earlier, fifth-seeded Stepanek outlasted Lukas Lacko of Slovakia 7-6 (4), 5-7, 7-6 (5) to reach his second quarterfinal of the season after losing in the last eight at Eastbourne in June.
"It's all about practice and preparation. This is the result," Stepanek said after the match lasted for more than 2 1/2 hours. "It was very close."
Stepanek saved two set points while serving at 5-4 down in the opening set. After levelling the match, Lacko received treatment for a right thigh injury. Stepanek missed his first match point at 5-4 in the final set before closing out the victory with his 15th ace.
"In the second set, he got physical troubles but I didn't know how to handle the situation," said Stepanek with a hoarse voice. "You can hear that I am not 100 per cent healthy either."
Eighth-seeded Rosol served 10 aces while beating Mirza Basic of Bosnia-Hercegovina 6-3, 7-5 to reach his third quarterfinal of the year.
In first-round play, Lukasz Kubot of Poland defeated Florian Mayer of Germany 7-6 (1), 6-4. The 74th-ranked Kubot, who came back from 3-0 down in the second set, next plays third-seeded Fabio Fognini of Italy.