Serena beat Sloane in Madrid Open

Updated: 00:00 GMT, Jan 1, 1970 | Published: 06:41 GMT, May 5, 2015 |

World number one Serena Williams extended her winning streak to 25 matches as she beat Sloane Stephens in the second round of the Madrid Open.

Williams saw off her fellow American 6-4 6-0 to rack up her 25th win stretching back to last season and take her record for 2015 to 22-0.

The top seed will next play Victoria Azarenka or Ajla Tomljanovic. Fifth seed Caroline Wozniacki and ninth seed Agnieszka Radwanska both won to set up a third-round meeting.

Denmark’s Wozniacki beat Christina McHale of the United States 7-5 6-0, while Pole Radwanska defeated Australian Casey Dellacqua 6-2 6-1. “We grew up playing together,”