News that Roger Federer and his wife Mirka welcomed twin boys on Tuesday, joining the four-year-old twin girls they already have, led one European betting outfit to get creative.

News that Roger Federer and his wife Mirka welcomed twin boys on Tuesday, joining the four-year-old twin girls they already have, led one European betting outfit to get creative.

Tennis icon Roger Federer has become the seventh billionaire athlete in history, according to estimates published by Forbes on Friday.