Tennis stars entertain fans with charity event

Roger Federer's wife Mirka (C) sits with their children, family members and former tennis players Stefan Edberg (2nd L) and Mary Joe Fernandez (2nd R) as they watch Federer and other players participate in a charity event at the Rod Laver Arena in Melbourne Park January 17, 2015, in this handout courtesy of Tennis Australia. The Australian Open tennis tournament begins on January 19.