![General view of the Hamburg Rothenbaum tennis stadium during a match between Germany's Nicolas Kiefer and Stanislas Wawrinka of Switzerland at the Hamburg Masters Tennis tournament in Hamburg May 14, 2008. REUTERS/Christian General view of the Hamburg Rothenbaum tennis stadium during a match between Germany's Nicolas Kiefer and Stanislas Wawrinka of Switzerland at the Hamburg Masters Tennis tournament in Hamburg May 14, 2008. REUTERS/Christian](https://c8.alamy.com/comp/2E78A99/general-view-of-the-hamburg-rothenbaum-tennis-stadium-during-a-match-between-germanys-nicolas-kiefer-and-stanislas-wawrinka-of-switzerland-at-the-hamburg-masters-tennis-tournament-in-hamburg-may-14-2008-reuterschristian-charisius-germany-2E78A99.jpg)
General view of the Hamburg Rothenbaum tennis stadium during a match between Germany's Nicolas Kiefer and Stanislas Wawrinka of Switzerland at the Hamburg Masters Tennis tournament in Hamburg May 14, 2008. REUTERS/Christian
Roger Federer of Switzerland serves during the final match against... Nachrichtenfoto - Getty Images
![Federer from Switzerland returns ball to Coria from Argentina during quarter-final match at Hamburg Masters Tennis tournament. Roger Federer from Switzerland returns a ball to Guillermo Coria from Argentina in their quarter-final Federer from Switzerland returns ball to Coria from Argentina during quarter-final match at Hamburg Masters Tennis tournament. Roger Federer from Switzerland returns a ball to Guillermo Coria from Argentina in their quarter-final](https://c8.alamy.com/comp/2D4G9EW/federer-from-switzerland-returns-ball-to-coria-from-argentina-during-quarter-final-match-at-hamburg-masters-tennis-tournament-roger-federer-from-switzerland-returns-a-ball-to-guillermo-coria-from-argentina-in-their-quarter-final-match-at-the-hamburg-masters-tennis-tournament-may-13-2005-federer-won-the-match-6-4-7-6-reuterschristian-charisius-2D4G9EW.jpg)