GENEVA(AP) Roger Federer became a father of twin girls after his wife Mirka gave birth Thursday.
In a statement released on his personal Web site and Facebook page, tennis' world No. 1 said the girls have been named Charlene Riva and Myla Rose.
``I have some exciting news to share with you,'' Federer's Facebook page said.
``Late last night, in Switzerland, Mirka and I became proud parents of twin girls.
``We named them Myla Rose and Charlene Riva and they are both healthy, and along with their mother they are doing great.
``This is the best day of our lives.''
It was the first children for the couple, married in April.
Earlier this month, Mirka sat courtside through the nerve-racking Wimbledon final in which Federer beat American Andy Roddick 5-7, 7-6 (6), 7-6 (5), 3-6, 16-14 to clinch his 15th grand slam title, breaking the record held by Pete Sampras.
The 27-year-old Federer met his wife-to-be - born Miroslava Vavrinec in Slovakia - in 2000 when they were competing for Switzerland in the Sydney Olympics.
Mirka, 31, emigrated with her family to Switzerland as a small child, and after playing on the WTA Tour and retiring prematurely due to injury, she became one of Federer's managers.