![Swiss tennis pro Roger Federer applauds with his racket after his Hamburg Masters second round match against Argentinian Juan Monaco at the 'Rothenbaum' tennis stadium in Hamburg, Germany, 16 May 2007. Federer Swiss tennis pro Roger Federer applauds with his racket after his Hamburg Masters second round match against Argentinian Juan Monaco at the 'Rothenbaum' tennis stadium in Hamburg, Germany, 16 May 2007. Federer](https://c8.alamy.com/comp/DAWYGR/swiss-tennis-pro-roger-federer-applauds-with-his-racket-after-his-DAWYGR.jpg)
Swiss tennis pro Roger Federer applauds with his racket after his Hamburg Masters second round match against Argentinian Juan Monaco at the 'Rothenbaum' tennis stadium in Hamburg, Germany, 16 May 2007. Federer
![Roger Federer of Switzerland waves after defeating Nicolas Kiefer of Germany in the semi final at the Gerry Weber Open ATP tennis tournament in Halle June 14, 2008. Federer beat Kiefer 6-1 Roger Federer of Switzerland waves after defeating Nicolas Kiefer of Germany in the semi final at the Gerry Weber Open ATP tennis tournament in Halle June 14, 2008. Federer beat Kiefer 6-1](https://c8.alamy.com/comp/2E77WGT/roger-federer-of-switzerland-waves-after-defeating-nicolas-kiefer-of-germany-in-the-semi-final-at-the-gerry-weber-open-atp-tennis-tournament-in-halle-june-14-2008-federer-beat-kiefer-6-1-6-4-reuterswolfgang-rattay-germany-2E77WGT.jpg)
Roger Federer of Switzerland waves after defeating Nicolas Kiefer of Germany in the semi final at the Gerry Weber Open ATP tennis tournament in Halle June 14, 2008. Federer beat Kiefer 6-1
![Ron Yu on Twitter: "Can't believe I'm already stringing more of these so soon. #GOATneversleeps https://t.co/as3mRZjRjA" / Twitter Ron Yu on Twitter: "Can't believe I'm already stringing more of these so soon. #GOATneversleeps https://t.co/as3mRZjRjA" / Twitter](https://pbs.twimg.com/media/C4EiJ9EWAAA5cp3.jpg:large)
Ron Yu on Twitter: "Can't believe I'm already stringing more of these so soon. #GOATneversleeps https://t.co/as3mRZjRjA" / Twitter
![15 March, 2014: Roger Federer of Switzerland hits a return to Alexandr Dolgopolov of the Ukraine during the BNP Paribas Open at Indian Wells Tennis Garden in Indian Wells CA. (Photo by 15 March, 2014: Roger Federer of Switzerland hits a return to Alexandr Dolgopolov of the Ukraine during the BNP Paribas Open at Indian Wells Tennis Garden in Indian Wells CA. (Photo by](https://c8.alamy.com/comp/2EXNBD4/15-march-2014-roger-federer-of-switzerland-hits-a-return-to-alexandr-dolgopolov-of-the-ukraine-during-the-bnp-paribas-open-at-indian-wells-tennis-garden-in-indian-wells-ca-photo-by-cal-sport-mediasipa-usa-2EXNBD4.jpg)