Roger Federer is not just one of the most recognisable tennis players in the world, but a global icon who has resonated far beyond the sport. Getting into Wimbledon should not be a problem for the eight-time champion, right? Wrong. Two weeks ago, Federer was in London. The Swiss star had two hours to kill before his flight, so he decided to pay the All England Club a visit. Little did the 20-time...

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