Sharapova vs Serena again, this time in Madrid final

Maria will try and stop a long losing streak to Serena.

Maria Sharapova and Serena Williams will both try and reach a round number on Sunday when they face off for the 15th time, on this occasion in the final of Madrid.

Williams will be going for the 50^th title, while Sharapova will go for No. 30. They have clearly been the WTA