Tennis greats Roger Federer and Serena Williams open play today at the 2012 London Olympics tennis event. The two Wimbledon champions return to the familiar Center Court where they won just a few weeks ago, but this time the goal in the gold medal.
Federer meets the pesky Alejandro Falla who nearly stunned the Swiss in the first round in 2010.
“The pressure is obviously big because it is a different type of event. It only happens every four years, so that is not quite something we are used to,” said Federer.
“I always thought I would play with such incredible pressure here, it would be very difficult, but now thinking about the whole situation I am going into this year, I don’t feel so much pressure because I feel I already have an Olympic gold, maybe the doubles but not the singles, nevertheless nobody can take that away from me and Stan [Wawrinka]. So I go in with great excitement and a lot of motivation to do well and enjoy the event and try my very best.”
Serena faces Jelena Jankovic in a battle of former No. 1s.
Also on Day One, former Wimbledon finalists Tomas Berdych and Janko Tipsarevic are in action. 2011 Wimbledon Petra Kvitova is on along with US Open champions Sam Stosur and Juan Martin Del Potro and French Open winners Li Na and Ana Ivanovic.
Andy Roddick and John Isner, who is also in singles today, are scheduled for doubles along with the Murray brothers.
Tomas BERDYCH (CZE)  V Steve DARCIS (BEL)
Serena WILLIAMS (USA)  V Jelena JANKOVIC (SRB)
Roger FEDERER (SUI)  V Alejandro FALLA (COL)
Anne KEOTHAVONG (GBR) V Caroline WOZNIACKI (DEN) 
David NALBANDIAN (ARG) V Janko TIPSAREVIC (SRB)
Samantha STOSUR (AUS)  V Carla SUAREZ NAVARRO (ESP)
Petra KVITOVA (CZE)  V Kateryna BONDARENKO (UKR)
Ivan DODIG (CRO) V Juan Martin del POTRO (ARG) 
You Might Like:
Serena, Sharapova, Bryans Bid For Golden Slam Saturday At Olympics
Bravo! Olympic Tennis from Wimbledon to be Shown by Bravo in U.S.
Andy Murray Carries The Olympic Torch Onto Wimbledon Center Court [Video]
Rogers Cup Tennis Preview; Olympic Wrap
Serena Williams Greatest Ever After Olympic Singles Tennis Gold?