Tennis ace Roger Federer is celebrating the birth of his twin daughters. His wife, Mirka, gave birth to the babies in Switzerland on July 23. The couple, together for nine years before finally tying the knot in April, named their baby girls Charlene Riva and Myla Rose. "This is the greatest day of our lives," says the current Wimbledon winner in a statement. "Mirka, Myla and Charlene are all healthy and doing very well," he added. Looks like there will be a new doubles team on the court soon!