Roger Federer's decision to retire 'a smart decision' – 'It's a miracle what he's done in the past five years'

He has worked with Roger Federer for more than two decades and fitness coach Pierre Paganini has described the tennis great’s decision to hang up his racket as “a wise decision” and a “relief”. Having played very little tennis over the past three years due to a knee injury, Federer announced last week that

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