The reigning world champion launched from sixth due to a gearbox penalty, but surged into the lead on lap 15 and ran unchallenged to the chequered flag to score Red Bull's 12th-consecutive win of the season.
When the lights went out, polesitter Leclerc swung across Perez’s bows to maintain the lead at La Source, where Carlos Sainz, starting fourth, locked up and then collided with Oscar Piastri running just behind from fifth on the grid on the inside.
