Switzerland's Roger Federer takes a break next to his girlfriend, Mirka Vavrinec, during a tennis practice session ahead of the Beijing 2008 Olympic Games in this August 7, 2008 file photo. Federer is to become a father for the first time, the world number two announced on Thursday. The 27-year-old Swiss revealed on his website (www.rogerfederer.com) that his girlfriend Mirka Vavrinec is pregnant. [Xinhua/Reuters]