Borna Coric (4), Croatia, def. Marton Fucsovics, Hungary, 6-7 (5), 7-5, 3-0, ret.
Casper Ruud (8), Norway, def. Salvatore Caruso, Italy, 6-3, 6-4.
Matteo Berrettini (3), Italy, def. Roberto Carballes Baena, Spain, 6-1, 6-2.
Joao Sousa, Portugal, def. Karen Khachanov (2), Russia, 7-6 (2), 6-4.
Daniil Medvedev (1), Russia, def. Evgeny Donskoy, Russia, 7-5, 6-3.
Andrey Rublev (5), Russia, def. Ricardas Berankis, Lithuania, 6-4, 6-7 (5), 6-1.
Nikola Mektic and Franko Skugor (1), Croatia, def. Nicholas Monroe, United States, and Andrei Vasilevski, Belarus, 6-4, 6-2.
Sander Gille and Joran Vliegen (2), Belgium, def. Adrian Mannarino, France, and Hugo Nys, Monaco, 6-4, 6-4.
Simone Bolelli and Matteo Berrettini, Italy, def. Frederik Nielsen, Denmark, and Tim Puetz, Germany, 6-4, 4-6, 10-7.
Igor Zelenay, Slovakia, and Divij Sharan, India, def. Andres Molteni, Argentina, and Roberto Carballes Baena, Spain, 7-5, 5-7, 10-5.Thursday
At Sibur Arena
St. Petersburg, Russia
Surface: Hardcourt indoor
ST. PETERSBURG, RUSSIA (AP) _ Results Thursday from St. Petersburg Open at Sibur Arena (seedings in parentheses):
Round Of 16
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