![Switzerland's Roger Federer shows off his 2009 ATP World Tour Champion trophy presented to him during the ATP World Tour Finals tennis at the 02 Arena in London, Wednesday, Nov. 25, 2009. Switzerland's Roger Federer shows off his 2009 ATP World Tour Champion trophy presented to him during the ATP World Tour Finals tennis at the 02 Arena in London, Wednesday, Nov. 25, 2009.](https://c8.alamy.com/comp/2P7R2G9/switzerlands-roger-federer-shows-off-his-2009-atp-world-tour-champion-trophy-presented-to-him-during-the-atp-world-tour-finals-tennis-at-the-02-arena-in-london-wednesday-nov-25-2009-roger-federer-has-reclaimed-his-spot-at-the-top-of-the-tennis-world-securing-the-year-end-no-1-ranking-for-the-fifth-time-in-his-career-ap-photosang-tan-2P7R2G9.jpg)
Switzerland's Roger Federer shows off his 2009 ATP World Tour Champion trophy presented to him during the ATP World Tour Finals tennis at the 02 Arena in London, Wednesday, Nov. 25, 2009.
![Daniil Medvedev battles to victory at ATP World Tour Finals as curtain comes down on event at O2 Arena after 12 years Daniil Medvedev battles to victory at ATP World Tour Finals as curtain comes down on event at O2 Arena after 12 years](https://www.telegraph.co.uk/content/dam/tennis/2020/11/22/TELEMMGLPICT000245100706_trans_NvBQzQNjv4BqQpeGv_xTcGu9U5p8psk4dfgWDJ4ncySDTj_WOkMYVXI.jpeg)
Daniil Medvedev battles to victory at ATP World Tour Finals as curtain comes down on event at O2 Arena after 12 years
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