STANFORD, Calif. (AP) — Serena Williams finally realized what happened days later, when she was allowed to get out of bed.

Williams said she was barely aware of how sick she was as she tried to play through a viral infection that caused her to lose equilibrium during a women's doubles match with sister Venus at Wimbledon. It was only later, when she was able to clear her head, that she realized the seriousness of her situation.

Doctors wouldn't let her leave her room, so she got some much-needed rest before resuming a full schedule that included a working vacation and a movie shoot.

Looking comfortable and relaxed, the world's No. 1 player said she's ready to renew her pursuit of excellence on the court. The world's No. 1 ranked player meets the Czech Republic's Karolina Pliskova on Wednesday in the second round of the Bank of West Classic.