The Duchess of Cambridge and Roger Federer announce charity tennis open
The Duchess of Cambridge and Roger Federer are joining forces to host a charity tennis open. The 40-year-old royal - who has Prince George, nine, Princess Charlotte, seven, and Prince Louis, four, with Prince William - and the 41-year-old Swiss champion are helping to raise funds for Action for Children and the Lawn Tennis Association’s (LTA) Tennis Foundation with the special tournaments at London's The O2 this September. Catherine is a patron of the former non-profit, which provides practical and emotional care and support to young people.