Janko Tipsarevic reached his 13th quarterfinal of the season by defeating Ernests Gulbis 6-3, 6-4 Thursday at the Erste Bank Open.
Tipsarevic will face Aljaz Bedene of Slovenia in the quarterfinals. Bedene edged Donald Young of the United States 7-6 (4), 6-7 (2), 6-3.
The ninth-ranked Tipsarevic, who is looking to qualify for the season-ending ATP World Tour Finals, dropped serve once in each set but dominated play from the baselines.
''I have to be pumped for every single point and not think what's going on behind me or ahead of me,'' he said. ''The only thing I care about now is winning my next match. I don't think about winning the tournament or about reaching London.''
Tipsarevic said his new attitude developed after Serbia won the Davis Cup, helping him become a consistent top-10 player this year.
''I don't feel I improved my forehand, backhand or serve dramatically,'' he said. ''I just feel that now I am living and breathing tennis outside of the tennis court as much as I am on the tennis court. ... This changed after winning the Davis Cup. I realized I wasn't getting any younger and that I would regret it if I realized one day that I could have reached more in my career.''
Tommy Haas landed the 500th win of his career, beating Jesse Levine of the United States 6-4, 6-2.
''It's incredible I've reached that mark today,'' said Haas, who struggled with shoulder and hip injuries before returning to the top 20 this week. ''I had hardly played for three and a half years before returning to the tour a year ago. I was even hungrier for success and getting to 500 wins became a major goal of mine.''
Haas is the 38th player in the modern era to have won 500 matches. Only three others are still active — Roger Federer (871), Rafael Nadal (583) and Lleyton Hewitt (566).
Haas saved two break points early in the second set against Levine but did not concede a game afterward.
''It wasn't easy, he is a very dangerous player,'' the German said. ''He attacked well but I got the right answers every time and served really well.''
Marinko Matosevic of Australia beat wild card Dominic Thiem of Austria 6-3, 7-6 (5) to set up a quarterfinal against top-seeded Juan Martin del Potro.
The 55th-ranked Matosevic, who was on a six-match losing streak before the event, held serve throughout. Thiem, ranked 394th, had eight aces but missed out on his first career quarterfinal.
In other second-round play, Grega Zemlja of Slovenia beat Matthew Ebden of Australia 7-5, 6-4; and Paolo Lorenzi of Italy defeated Vasek Pospisil of Canada 6-4, 6-4.
Marinko Matosevic defeated wild card Dominic Thiem 6-3, 7-6 (5) to set up a quarterfinal match against top-seeded Juan Martin del Potro. Grega Zamlja beat Matthew Ebden 7-5, 6-4, and Paolo Lorenzi defeated Vasek Posposil 6-4, 6-4.
