![Austria's Daniel Koellerer pumps his fist after winning his first round match against compatriot Philipp Oswald at the ATP Austrian Open tennis tournament in Kitzbuehel, July 15, 2008. REUTERS/Dominic Ebenbichler (AUSTRIA Stock Austria's Daniel Koellerer pumps his fist after winning his first round match against compatriot Philipp Oswald at the ATP Austrian Open tennis tournament in Kitzbuehel, July 15, 2008. REUTERS/Dominic Ebenbichler (AUSTRIA Stock](https://c8.alamy.com/comp/2E8CGEK/austrias-daniel-koellerer-pumps-his-fist-after-winning-his-first-round-match-against-compatriot-philipp-oswald-at-the-atp-austrian-open-tennis-tournament-in-kitzbuehel-july-15-2008-reutersdominic-ebenbichler-austria-2E8CGEK.jpg)
Austria's Daniel Koellerer pumps his fist after winning his first round match against compatriot Philipp Oswald at the ATP Austrian Open tennis tournament in Kitzbuehel, July 15, 2008. REUTERS/Dominic Ebenbichler (AUSTRIA Stock
![Austria's Koellerer eyes the ball during a first round match against Tabara of the Czech Republic at the Kitzbuehel Open tennis tournament in Austria. Austria's Daniel Koellerer eyes the ball during a Austria's Koellerer eyes the ball during a first round match against Tabara of the Czech Republic at the Kitzbuehel Open tennis tournament in Austria. Austria's Daniel Koellerer eyes the ball during a](https://c8.alamy.com/comp/2D42JFR/austrias-koellerer-eyes-the-ball-during-a-first-round-match-against-tabara-of-the-czech-republic-at-the-kitzbuehel-open-tennis-tournament-in-austria-austrias-daniel-koellerer-eyes-the-ball-during-a-first-round-match-against-michal-tabara-of-the-czech-republic-at-the-kitzbuehel-open-tennis-tournament-in-austria-july-26-2005-koeller-won-7-6-3-6-6-4-reutersdominic-ebenbichler-2D42JFR.jpg)
Austria's Koellerer eyes the ball during a first round match against Tabara of the Czech Republic at the Kitzbuehel Open tennis tournament in Austria. Austria's Daniel Koellerer eyes the ball during a
![Daniel Koellerer of Austria hits a return to Juan Martin Del Potro of Argentina during their match at the U.S. Open tennis championship in New York, September 6, 2009. REUTERS/David Gray (UNITED Daniel Koellerer of Austria hits a return to Juan Martin Del Potro of Argentina during their match at the U.S. Open tennis championship in New York, September 6, 2009. REUTERS/David Gray (UNITED](https://c8.alamy.com/comp/2D2GR4J/daniel-koellerer-of-austria-hits-a-return-to-juan-martin-del-potro-of-argentina-during-their-match-at-the-us-open-tennis-championship-in-new-york-september-6-2009-reutersdavid-gray-united-states-sport-tennis-2D2GR4J.jpg)