Rain delays Olympic Tennis program

Steady rain has delayed the start of the Olympic tennis program by more than three hours.

A packed schedule on Wednesday was due to feature the women's singles quarter-finals and all eight men's third-round matches as well as doubles.

But the poor weather meant the start of the first women's quarter-final between Madison Keys of the USA and Russia's Daria Kasatkina on centre court was pushed back.

Outside courts were also delayed.