ANGALIA PICHA ZA MICHELLE OBAMA LIPOAMUA KUHAMASISHA MCHEZO WA TENNIS

On the ball: Michelle Obama with Sasha and Malia at the Arthur Ashe Kids' Day for the start of the U.S. Open

Role models: The First Lady praises Serena Williams, left, and other players for promoting sport

Fan: Michelle Obama plays a quick game of tennis at the start of the London Games in 2012