Eight-time champion Serena Williams has withdrawn from the Miami Open because of a knee injury.
American Williams reached round three on Friday with victory over Sweden's Rebecca Peterson, only the seventh match she has completed in 2019.
The 23-time Grand Slam winner was set to face Wang Qiang in the last 32 but the Chinese 27-year-old now gets a bye.
"I am disappointed to withdraw from the Miami Open due to a left knee injury," said Williams, 37.
Williams has now withdrawn from two consecutive WTA events, after her retirement from last week's tournament in Indian Wells with a viral illness.