Jannik Sinner (14), Italy, def. Guido Pella, Argentina, 6-2, 4-4, ret.
Casper Ruud, Norway, def. Felix Auger-Aliassime (15), Canada, 6-1, 6-4.
Kei Nishikori, Japan, def. Karen Khachanov, Russia, 6-7 (6), 6-2, 6-2.
John Millman, Australia, def. Hubert Hurkacz (12), Poland, 5-7, 7-6 (7), 6-3.
Yoshihito Nishioka, Japan, def. Filip Krajinovic, Serbia, 6-2, 6-4.
Alejandro Davidovich Fokina, Spain, def. Pierre-Hugues Herbert, France, 6-7 (5), 7-6 (4), 7-6 (4).
Alexei Popyrin, Australia, def. Jan-Lennard Struff, Germany, 6-3, 7-6 (4).
Albert Ramos-Vinolas, Spain, def. Taylor Fritz, United States, 7-5, 5-7, 6-4.
Benoit Paire, France, def. Nikoloz Basilashvili, Georgia, 6-4, 7-5.
Roberto Bautista Agut (9), Spain, def. Marco Cecchinato, Italy, 6-2, 6-7 (3), 7-5.
Andrey Rublev (6), Russia, def. Tommy Paul, United States, 6-7 (5), 6-3, 6-4.
Alexander Bublik, Kazakhstan, def. Denis Shapovalov (11), Canada, 6-4, 5-7, 6-4.
Matteo Berrettini (8), Italy, def. Fabio Fognini, Italy, 6-3, 6-4.
Dominic Thiem (3), Austria, def. Marcos Giron, United States, 6-1, 6-3.
Alex de Minaur, Australia, def. Lloyd Harris, South Africa, 6-2, 3-0, ret.
Elise Mertens (13), Belgium, def. Simona Halep (3), Romania, 4-6, 7-5, 7-5.
Aryna Sabalenka (5), Belarus, def. Jessica Pegula, United States, 6-1, 6-2.
Anastasia Pavlyuchenkova, Russia, def. Jennifer Brady (11), United States, 7-5, 6-7 (8), 6-3.
Karolina Muchova, Czech Republic, def. Maria Sakkari (16), Greece, 6-0, 6-7 (9), 7-5.
Tim Puetz and Alexander Zverev, Germany, def. Hubert Hurkacz, Poland, and Felix Auger-Aliassime, Canada, 6-2, 6-4.
Lukasz Kubot, Poland, and Wesley Koolhof (7), Netherlands, def. Stefanos Tsitsipas and Petros Tsitsipas, Greece, 6-4, 5-7, 10-6.
Sander Gille and Joran Vliegen, Belgium, def. Marton Fucsovics, Hungary, and Casper Ruud, Norway, 6-3, 6-4.
Horia Tecau, Romania, and Kevin Krawietz, Germany, def. Edouard Roger-Vasselin, France, and Henri Kontinen, Finland, 6-3, 6-4.
Veronika Kudermetova and Anastasia Potapova, Russia, def. Victoria Azarenka, Belarus, and Ons Jabeur, Tunisia, walkover.
Zheng Saisai, China, and Ellen Perez, Australia, def. Alexa Guarachi Mathison, Chile, and Desirae Krawczyk (5), United States, 6-4, 6-4.
Belinda Bencic and Jil Teichmann, Switzerland, def. Renata Voracova, Czech Republic, and Nao Hibino, Japan, 6-3, 7-5.
Vera Zvonareva and Elena Vesnina, Russia, def. Bethanie Mattek-Sands, United States, and Iga Swiatek, Poland, 4-6, 6-3, 10-5.
Gabriela Dabrowski, Canada, and Demi Schuurs (3), Netherlands, def. Veronika Kudermetova and Anastasia Potapova, Russia, 4-6, 6-2, 10-7.
Barbora Krejcikova and Katerina Siniakova (2), Czech Republic, def. Madison Keys and Jessica Pegula, United States, 3-6, 6-2, 10-8.
