Roger Federer tells his own children how they can become professional tennis players
Federer, 36, is a father of two sets of twins - daughters Myla and Charlene, who celebrated their eighth birthdays in August, and Leo and Lenny who turned three in May.
The 19-time Grand Slam champion is regarded as one of the greatest sportsmen in history.
And his kids have some strict instructions if they are to follow their dad into the sporting arena - try hard.
Federer said: "I want them to enjoy their sports whatever they are doing, and that they try hard, not to just waste time, waste money and waste somebody else's time.
"If they do it, I want them to do it with passion... read more
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