Quarterfinals and semifinals action at the 2012 Western & Southern Open highlight what will be a busy day of action on Saturday. We saw notable players such as Novak Djokovic and Venus Williams advance on Friday, while No. 2 seed Serena Williams lost in an upset.
On center court at 1 p.m. ET it'll be Djokovic taking on Juan Martin Del Potro in semifinals action. Following this match will be Roger Federer against the unranked Stanislas Wawrinka. Look for this one to start about 30 minutes after the conclusion of Del Potro vs. Djokovic.
On the women's side it'll be No. 9 seed Na Li against Venus Williams in semifinal play around 7 p.m. The other match will be five-seed Angelique Kerber vs. four-seed Petra Kvitova.
You can find a complete schedule of the events here, including doubles action.