The 35-year-old took out the No. 1 player in the world on Tuesday night.
Andy Murray advanced to the men's quarterfinals, and Serena Williams dropped China's Li Na in the women's quarterfinals of the 2013 Sony Open on Tuesday.
The WTP world No. 1 overcame some challenges to move on and continue her quest for a record sixth title in Miami.
Serena Williams narrowly avoided an upset in the fourth round of the 2013 Sony Open, coming back to best No. 13 seed Dominika Cibulkova.
The men's draw wraps up third-round play, while the women's field gets Round 4 underway. Take a look at the schedule for Monday at the 2013 Sony Open.
Novak Djokovic hasn't dropped a set in two matches at the 2013 Sony Open. Here's a look at his third-round win, along with the rest of the action from Sunday.
Some of the top seeds at the Sony Open will be in action on Sunday, including No. 1 Novak Djokovic and No. 3 David Ferrer.