Serena Williams needed just 58 minutes to beat fellow American Sloane Stephens 6-4, 6-0 on Monday and reach the third round of the Madrid Open.
The top-ranked Williams broke Stephens four times and saved both break points she faced. She will next face the winner between Victoria Azarenka and Ajla Tomljanovic.
Earlier, Caroline Wozniacki powered past Christina McHale of the United States 7-5, 6-0 Monday to reach the third round of the Madrid Open.