One minute you're doing algebra, the next minute you're beating the World No.5 - it was all in a day's work for Madison Keys as the first round of the Mutua Madrid Open continued Sunday.
Venus Williams was at the Mutua Madrid Open on Saturday, not on the match court but around the grounds - the former World No.1 made an appearance at her own EleVen by Venus booth.
There was heavy hitting in the World Group play-offs, with Sabine Lisicki blasting an ace to put Germany into next year's World Group and both Williams sisters lifting their games for the US.
Does Venus feel like she has killer instinct? Why didn't Serena use the karaoke machine in the player lounge in Charleston? Find out the answers to those questions and more right here...
Catch up on all the WTA news from the past seven days, including Serena and Anastasia's hat-trick hauls and an epic encounter to kick off the clay court season.
Serena Williams didn't make a single unforced error in the first set and was eventually just too sharp for Venus Williams, winning their semifinal clash at the Family Circle Cup in straight sets.
The Williams sisters doubled up at the Family Circle Cup on Friday, winning two matches to set up a semifinal clash. Elsewhere, Jelena Jankovic scored a milestone 500th career match win.
