Simona Halep (ROU)  vs. Angelique Kerber  (GER). These two have faced each other 8 times and split the meetings evenly. Kerber has won the one match they played on clay while Halep won their last meeting in a major (the 2018 Australian Open semifinal). This is basically a pick 'em match. PREDICTION: Halep.
Garbiñe Muguruza (ESP)  vs. Maria Sharapova (RUS) . After getting past Serena Williams for the first time in over a decade due to the 23-time major champion's withdrawal in the 4th round, Sharapova's reward is a match with one of the hottest players in the tournament, the #3 seed who is yet to drop a set. Surprisingly, Sharapova has never lost to Muguruza in 3 matches, but none of their meetings have come since Muguruza broke through and became a major champion herself by beating Serena here two years ago. The two have a very similar style but Muguruza is younger and more athletic. I'd put my money on youth versus experience in this match up. PREDICTION: Muguruza.
Madison Keys (USA)  vs.