Ninth-seeded Auger-Aliassime was up by two sets and had a match point in the third, but Medvedev came back for a 6-7 (4), 3-6, 7-6 (2), 7-5, 6-4 comeback victory.

Auger-Aliassime overcame a fast and furious start by 2018 finalist Marin Cilic and held on tight until he could turn things around, in a 2-6, 7-6 (7), 6-2, 7-6 (4) victory.