Venus Williams looked disoriented , could n't even serve . She says 'this bug ' made it difficult to play . She 's been ill for days , sister Williams says . The Serena Williams sisters have won one doubles titles at CNN .
Serena Williams looked disoriented , could n't even serve . She says 'this bug ' made it difficult to play . She 's been ill for days , sister Venus Williams says . The Williams sisters have won five doubles titles at Wimbledon .