By The Associated Press
WIMBLEDON, England — It's hard to know exactly what Serena Williams will be able to do over the next two weeks at the All England Club.
On the one hand, due at least in part to an injured left knee, Williams is short on matches and training time this season, factors she cited after her third-round exit June 1 at the French Open, her most recent tournament.
She has only 12 tour-level matches so far in 2019.
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