Serena Williams withdraws from Miami Open

WASHINGTON -- Serena Williams became the latest Grand Slam champion to pull out of the Miami Open on Sunday in order to concentrate on her recovery from recent oral surgery.

Novak Djokovic, Rafael Nadal and Roger Federer announced earlier they would withdraw from the tournament.

The former world No. 1 is an eight-time winner in Miami. Williams' most recent match was a month ago at the Australian Open, where she lost to Naomi Osaka from Japan in the semifinals.