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'Federer used to have a very bad temper'

He's won eight Wimbledon titles, six Australian Opens, five US Opens and one French Open...

But Roger Federer's former Swiss Davis Cup captain, Claudio Mezzadri, says the 20-time grand slam champion used to have a very bad temper and had to throw many racquets away!

Photo: Roger Federer (Getty Images)

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2 minutes