![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)
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 smashes his racket and receives a warning for misuse during his Vienna Open second round tennis match against Feliciano Lopez of Spain October 29, 2009. REUTERS/Heinz-Peter Bader (AUSTRIA Daniel Koellerer of Austria smashes his racket and receives a warning for misuse during his Vienna Open second round tennis match against Feliciano Lopez of Spain October 29, 2009. REUTERS/Heinz-Peter Bader (AUSTRIA](https://c8.alamy.com/comp/2E7C21D/daniel-koellerer-of-austria-smashes-his-racket-and-receives-a-warning-for-misuse-during-his-vienna-open-second-round-tennis-match-against-feliciano-lopez-of-spain-october-29-2009-reutersheinz-peter-bader-austria-sport-tennis-2E7C21D.jpg)
Daniel Koellerer of Austria smashes his racket and receives a warning for misuse during his Vienna Open second round tennis match against Feliciano Lopez of Spain October 29, 2009. REUTERS/Heinz-Peter Bader (AUSTRIA
![Daniel Koellerer calls ATP a 'mafia organisation' that ruined his life. - "He was of the view that [The Big 4] would never have been treated like he was" : r/tennis Daniel Koellerer calls ATP a 'mafia organisation' that ruined his life. - "He was of the view that [The Big 4] would never have been treated like he was" : r/tennis](https://external-preview.redd.it/sWkrUDJ3sK9vn-wCkKMDFkNhK9Z8_nwHsS712q6g6Jk.jpg?auto=webp&s=f075165a0c1f847a0a3d3bc0630151c54a966006)