Before each day's play at the Madrid Open, we'll preview three must-see matches.

As well, Daniil Medvedev and Karen Khachanov square off for the fifth time.

Cirstea is 4-1 against Kvitova in hard-court matches, and will be confident she can pull off this upset.

In another example of tennis' March Madness, the 32-year-old world No. 74 defeated the Australian Open champion in straight sets.

Flanked by new coach Thomas Johansson, the former No. 21 has reached back-to-back quarterfinals in Indian Wells and Miami, with her best perhaps yet to come.

Aryna Sabalenka and Sorana Cirstea also meet in a new matchup, while Jannik Sinner seeks to stay unbeaten against Emil Ruusuvuori Wednesday.

The Romanian beat the Frenchwoman in the fourth round of Indian Wells and now in the second round in Miami.

The Romanian was flummoxed by a slew of dodgy line calls en route to a three-set win over Cibulkova at the 2012 Bank of the West Classic.

The former world No. 1 and 2015 champion scored a 19th straight win over her compatriots with a victory against in-form Sorana Cirstea.

Two of 2021’s standout performers will face off for a spot in the semifinals of the WTA 500-level event.