The world's No. 1 player advances with 6-1, 6-3 victory over Mandy Minella.
No. 3 seed advances with first-round win at Wimbledon. Williams plays Tuesday.
Steve Darcis sends the French Open champion home early.
Slippery conditions prove treacherous on the first day of play at the All England Club.
Williams, the defending champion, and Sharapova wouldn't meet until the final.
World's No. 1 player is drawing criticism for comment in Rolling Stone interview.
Williams will not pursue her sixth singles title there because of back problems.
Back injury flared up during the Italian Open last week.