Roger Federer and Wife Playing Doubles

Grand Slam tennis champ Roger Federer and his wife Mirka are proud new parents to twin girls, the No. 1 player in the world announced on his website under "off court news."Daughters Charlene Riva Federer and Myla Rose Federer arrived late last night in Switzerland, Roger says, adding, "This is the greatest day of our lives. Mirka, Myla and Charlene are all healthy and doing very well."

The couple of nine years, who were married in March, never announced previously that they were expecting twins.