Michelle Obama cheers on Serena Williams

Wimbledon champion Serena Williams breezed through her first round match against Serbia's Jelena Jankovic on the opening day of the Olympic tennis, with US First Lady Michelle Obama cheering her on. Obama watched from the players box along with Williams' sister Venus as the fourth seed took just 61 minutes to see off former world number one Jankovic 6-3 6-1.