Every week there's a lot happening on the WTA - on the court, off the court, by the numbers, even a few tweets... catch up on it all in this week's WTA Diary.
Next month, Andy Murray, Martina Navratilova, and Tim Henman will be among those taking part in the 'Rally for Bally' fundraisers at Queens and the Aegon Classic, in Birmingham. Proceeds will go to The Royal Marsden Cancer Charity and The Elena Baltacha Academy of Tennis.
The opening few rounds in Madrid passed without too many shocks, with Dominika Cibulkova the only notable casualty. Maria Sharapova was given a bit of a scare, though, rallying from 4-1 down in the decider to defeat Christina McHale.
Ahead of her title defense, Serena took in the sights of the Spanish capital with her dog, Lorelei.
Eugenie Bouchard and Jim Parsons from The Big Bang Theory are pen pals.