MADRID, Spain – Revenge is the theme of the day as the round of 16 kicks off with Simona Halep and Petra Kvitova seeking to avenge some painful losses earlier this season and grab a spot in the Mutua Madrid Open quarterfinals. Preview the day’s action right here on wtatennis.com

Wednesday, Round of 16

[6] Simona Halep (ROU #7) vs [10] Timea Bacsinszky (SUI #15)
Head-to-head: Halep leads 2-1
Key Stat: Bacsinszky has spent 4 hours and 55 minutes on court compared to Halep’s 2 hours and 2 minutes

No.10 seed Timea Bacsinszky is feeling the effects of her busy schedule – fresh off of her title in Rabat, she came straight to the Spanish capital and was back at it again.

Despite her resilient effort, the cracks are showing in the Swiss’ game – she’s spent five hours on court in two matches and struggled to close out Ekaterina Makarova in the last round.

“It’s my seventh match in eight days, so if I have a lack of energy sometimes, I think it’s kind of normal,” Bacsinszky explained in press after the match. “I’m really happy that I won, whether it was in two, three sets… Even if it were in five I would be happy as well. I’m just happy that I won my match.”

The Swiss will have to channel all of her energy into her next matchup: she’s set to face No.6 seed Simona Halep on Court Manolo Santana. The on-fire Romanian only dropped two games in her demolition of Karin Knapp.

Halep has won two of their three meetings on tour, although did taste defeat earlier this year in Miami.

“Bacsinszky is revenge!” Halep said. “It’s going to be hard, it’s going to be difficult, a tough match for sure. I just want to go on court relaxed and play my game. It’s a good tournament, good people around me, so I am in a good place mentally and physically.”

Daria Gavrilova (AUS #39) vs [5] Petra Kvitova (CZE #6)
Head-to-head: Tied 1-1
Key Stat: Kvitova has yet to drop a service game in Madrid

Another rematch will be taking place on Court Arantxa Sanchez as Daria Gavrilova takes on the No.5 seed Petra Kvitova in the first match of the day.

Despite their head to head record being tied at 1-1, Kvitova will go into the matchup with revenge on the mind: the last time these two played each other was at this year’s Australian Open where the unseeded Gavrilova upset Kvitova in the second round.

But this time around the Czech is working with a new team and is back to putting together deep runs – she’s reached the quarterfinals or better at two of her last three events.

“I’m happy with my performance right now,” Kvitova said in second-round press conference. “I think I played great matches in Stuttgart, and especially two weeks before the Stuttgart I had a good preparation on the clay.

“I have a new coach. That’s always great to have someone who’s helping you and finding a good way of your game and plan. I feel okay and I hope that this will kind of continue.”

This all spells bad news for the big hitting Gavrilova, who has struggled to back up her fairytale run to the Australian Open round of 16. The Australian’s best result came in the green clay of Charleston, where she reached the round of 16 before falling to eventual champion Sloane Stephens.

Around the grounds: No.8 seed Carla Suárez Navarro closes out the women’s action on Court Manolo Santana against Samantha Stosur. The last remaining Spaniard, Suárez Navarro will face a tough test: she’s up against a well-rested opponent as Stosur received a walkover into the round of 16, and Suárez Navarro is also battling an upper respiratory illness. Meanwhile, No.4 seed Victoria Azarenka continues her steady march through Madrid: she has yet to drop a set and is up against Louisa Chirico, the American qualifier who ousted Ana Ivanovic to reach this stage. Qualifier Patricia Maria Tig – one of four Romanians left in the draw – closes out the night session against Madison Keys.