PARIS — Wind was whipping, rain was falling, and thick gray clouds overhead were foreboding as Serena Williams double-faulted, then raised her hands in despair and wailed, "I can't serve!" As if to prove the point, Williams double-faulted again moments later, before pushing a routine backhand wide to get broken at love. Truth is, the French Open's defending champion couldn't do much properly on this particular afternoon, absorbing the most lopsided loss of her 288-match Grand Slam career.