![German tennis pro Nicolas Kiefer looks frustrated during his match against Belarusian Mirnyi at the ATP German Masters in Hamburg, Germany, Wednesday, 17 May 2006. Kiefer lost the match in two sets German tennis pro Nicolas Kiefer looks frustrated during his match against Belarusian Mirnyi at the ATP German Masters in Hamburg, Germany, Wednesday, 17 May 2006. Kiefer lost the match in two sets](https://c8.alamy.com/comp/D3NHRG/german-tennis-pro-nicolas-kiefer-looks-frustrated-during-his-match-D3NHRG.jpg)
German tennis pro Nicolas Kiefer looks frustrated during his match against Belarusian Mirnyi at the ATP German Masters in Hamburg, Germany, Wednesday, 17 May 2006. Kiefer lost the match in two sets
![Nicolas Kiefer of Germany in action during his match against Rafael Nadal from Spain on day 5 of the US Open at the USTA Billie Stock Photo - Alamy Nicolas Kiefer of Germany in action during his match against Rafael Nadal from Spain on day 5 of the US Open at the USTA Billie Stock Photo - Alamy](https://c8.alamy.com/comp/C1Y5X3/nicolas-kiefer-of-germany-in-action-during-his-match-against-rafael-C1Y5X3.jpg)
Nicolas Kiefer of Germany in action during his match against Rafael Nadal from Spain on day 5 of the US Open at the USTA Billie Stock Photo - Alamy
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