![Musician David Foster (L) and Peter Haas watch the men's singles final match between Tommy Haas of Germany and Roger Federer of Switzerland at the Halle Open ATP tennis tournament in Halle Musician David Foster (L) and Peter Haas watch the men's singles final match between Tommy Haas of Germany and Roger Federer of Switzerland at the Halle Open ATP tennis tournament in Halle](https://c8.alamy.com/comp/2CXA6D6/musician-david-foster-l-and-peter-haas-watch-the-mens-singles-final-match-between-tommy-haas-of-germany-and-roger-federer-of-switzerland-at-the-halle-open-atp-tennis-tournament-in-halle-june-17-2012-reutersina-fassbender-germany-tags-sport-tennis-entertainment-2CXA6D6.jpg)
Musician David Foster (L) and Peter Haas watch the men's singles final match between Tommy Haas of Germany and Roger Federer of Switzerland at the Halle Open ATP tennis tournament in Halle
![Tennis - Aspall Tennis Classic - London, Britain - June 30, 2017 Spain's Rafael Nadal in action during his match against Germany's Tommy Haas Action Images via Reuters/Peter Cziborra Stock Photo - Alamy Tennis - Aspall Tennis Classic - London, Britain - June 30, 2017 Spain's Rafael Nadal in action during his match against Germany's Tommy Haas Action Images via Reuters/Peter Cziborra Stock Photo - Alamy](https://c8.alamy.com/comp/2EB53AB/tennis-aspall-tennis-classic-london-britain-june-30-2017-spains-rafael-nadal-in-action-during-his-match-against-germanys-tommy-haas-action-images-via-reuterspeter-cziborra-2EB53AB.jpg)
Tennis - Aspall Tennis Classic - London, Britain - June 30, 2017 Spain's Rafael Nadal in action during his match against Germany's Tommy Haas Action Images via Reuters/Peter Cziborra Stock Photo - Alamy
![Tommy Haas of Germany returns the ball during his Vienna Open second round tennis match against Aljaz Bedene of Slovenia in Vienna, October 27, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: SPORT TENNIS Tommy Haas of Germany returns the ball during his Vienna Open second round tennis match against Aljaz Bedene of Slovenia in Vienna, October 27, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: SPORT TENNIS](https://c8.alamy.com/comp/2CYC0BE/tommy-haas-of-germany-returns-the-ball-during-his-vienna-open-second-round-tennis-match-against-aljaz-bedene-of-slovenia-in-vienna-october-27-2011-reutersheinz-peter-bader-austria-tags-sport-tennis-2CYC0BE.jpg)
Tommy Haas of Germany returns the ball during his Vienna Open second round tennis match against Aljaz Bedene of Slovenia in Vienna, October 27, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: SPORT TENNIS
![German tennis player Haas' father in law David Foster (L), father Peter Haas (C), mother Brigitte Haas (R) and wife Sara Foster applaud after Hass' victory of the final of the ATP German tennis player Haas' father in law David Foster (L), father Peter Haas (C), mother Brigitte Haas (R) and wife Sara Foster applaud after Hass' victory of the final of the ATP](https://c8.alamy.com/comp/D65CT5/german-tennis-player-haas-father-in-law-david-foster-l-father-peter-D65CT5.jpg)