Tennis ace Roger Federer may be the number one player in the world, but now, he has a new title -- proud papa.
The 27-year-old announced Friday on his Web site that he and wife Mirka were the proud new parents of twin girls, Charlene Riva Federer and Myla Rose Federer, born in Switzerland Thursday night.
"This is the greatest day of our lives," Federer said on his Web site. "Mirka, Myla and Charlene are all healthy and doing very well."
Federer and Mirka have been together nine years , but only married in April. A month earlier, they announced they were expecting, but never revealed it was twins.
Earlier this month, Federer won Wimbledon, his 15th Grand Slam tennis title, beating Pete Sampras' previous record of 14.