21.11.2015. The O2, London, England. ATP Tennis Tour Finals. Day 7. Match Balls ready for play in the semi-final between Roger Federer (SUI)  and Stan Wawrinka (SUI) . Federer won the match 7-5, 6-3. (Photo by Stephen Bartholomew/Actionplus/Icon Sportswire) ****NO AGENTS----NORTH AND SOUTH AMERICA SALES ONLY----NO AGENTS----NORTH AND SOUTH AMERICA SALES ONLY****
Photographer: Stephen Bartholomew/Actionplus/Icon Sportswire
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