The Russian, who started second, was the first to cross the finish line, but immediately after the finish, the judges punished Mazepin with a five-second fine for pushing the opponent, Yuki Tsunoda from Carlin, off the track.
The judges are also considering two more episodes with Mazepin - an unsafe exit from the pit stop, as well as his behavior after the finish, when he, parking at the podium, knocked down the plate with the number "2".
Mick Schumacher from Prema closed the top three.
Russian Robert Schwartzman from Prema, who started fourth, finished the race in fifth position. Artyom Markelov from HWA AG started 19th and crossed the finish line 16th.
Earlier it was reported that Lewis Hamilton won the qualification for the Belgian Grand Prix.