Swiss tennis ace Roger Federer recently revealed he got very emotional when his wife Mirka gave birth to twin daughters Myla Rose and Charlene Riva in August 2009. "It were tears of joy.

I cried before Mirka went to the hospital, during and after birth. I am happy to have left my emotions, because thanks to it I'll always remember such a special and big moment for me," Federer was quoted as saying by Tennis World USA.