Sharapova, Murray weather Wimbledon wash-out
The three gold medal contenders were among just a handful of winners after downpours washed out much of the day's play at Wimbledon and closed the Centre Court roof.
Olympic tennis had not been played indoors since Stockholm 1912, but Murray and Sharapova shrugged off the chaos as both enjoyed the first Olympic wins of their careers.
Britain's Murray beat Switzerland's Stanislas Wawrinka 6-3, 6-3 and French Open champion Sharapova thrashed Israel's Shahar Peer 6-2, 6-0. Serbia's Djokovic, the second seed, beat Fabio Fognini of Italy 6-7 (7/9), 6-2, 6-2.