Monday at the Mutua Madrid Open presents a high-stakes, action-packed schedule for the Round of 16. The 16 players who have advanced in the tournament, including four among the top five seeds and six unseeded challengers, are all set to compete across eight separate matchups. Here is the complete breakdown of the day`s schedule, highlighting what could be one of the most significant days of tennis during this event.
No. 4 Coco Gauff vs. Belinda Bencic
Time: 11 a.m. local, 5 a.m. ET
Head-to-head: Tied at 2-2. Their most recent encounter was in the Round of 16 at Indian Wells earlier this year, where Bencic secured a three-set victory.
No. 7 Mirra Andreeva vs. Yuliia Starodubtseva
Time: 11 a.m. local, 5 a.m. ET
Head-to-head: This is their first career meeting (0-0).
No. 2 Iga Swiatek vs. No. 13 Diana Shnaider
Time: 1 p.m. local, 6 a.m. ET
Head-to-head: This is their first career meeting (0-0).
No. 5 Madison Keys vs. No. 19 Donna Vekic
Time: 1:30 p.m. local, 6:30 a.m. ET
Head-to-head: Keys leads 3-1. Keys won their last match in three sets during the Round of 16 at Indian Wells just last month.
No. 24 Marta Kostyuk vs. Anastasia Potapova
Time: 3 p.m. local, 9 a.m. ET
Head-to-head: Potapova leads 2-1. However, they have never faced each other on a clay surface.
No. 1 Aryna Sabalenka vs. Peyton Stearns
Time: 4 p.m. local, 10 a.m. ET
Head-to-head: Sabalenka holds a 1-0 lead. Their only previous match was a hard-fought 6-7(2), 6-2, 7-6(6) victory for Sabalenka in the second round at Indian Wells last year.
No. 21 Ekaterina Alexandrova vs. Moyuka Uchijima
Time: 7 p.m. local, 1 p.m. ET
Head-to-head: This is their first career meeting (0-0).
No. 17 Elina Svitolina vs. Maria Sakkari
Time: 9 p.m. local, 3 p.m. ET
Head-to-head: Their head-to-head is tied at 2-2. They have not played each other in nearly four years.
Jasper Hawthorne 
Dominic Ashworth