The sixth-seeded Kukushkin will play either Karen Khachanov or Joao Sousa in the quarterfinals. The seventh-seeded Mannarino was beaten 6-3, 6-1 in just over an hour by qualifier Egor Gerasimov, who last reached a tour-level quarterfinal in October 2018.
Norway's Casper Ruud came through a tough first-round encounter with Alexander Bublik 6-7 (3), 6-4, 6-2. The eighth-seeded Ruud plays Salvatore Caruso in the second round. It was the first indoor win on the ATP tour for the 20-year-old Ruud, who is usually considered a clay-court specialist.
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