Daniil Medvedev (3), Russia, def. Adrian Mannarino, France, 6-2, 6-3.

Carlos Alcaraz (2), Spain, def. Tommy Paul (7), United States, 6-4, 7-6 (2).

Alexander Zverev (1), Germany, def. Arthur Fery, Britain, 6-0, 6-2.

Alex de Minaur (5), Australia, def. Matteo Berrettini, Italy, 7-6 (4), 6-2.

Guido Andreozzi, Argentina, and Manuel Guinard, France, def. Simone Bolelli and Andrea Vavassori (4), Italy, 6-7 (5), 6-2, 11-9.

Tomas Martin Etcheverry and Francisco Cerundolo, Argentina, def. Maximo Gonzalez and Andres Molteni, Argentina, 6-3, 6-2.

Lucas Miedler and Neil Oberleitner, Austria, def. Harri Heliovaara, Finland, and Henry Patten (1), Britain, 6-7 (5), 7-6 (2), 10-5.

Ryan Seggerman and Learner Tien, United States, def. Christian Harrison, United States, and Neal Skupski (2), Britain, 7-6 (4), 7-6 (2).