The victory moved second-placed City on to 26 points after 11 games, one behind leaders Arsenal who visit Southampton on Sunday. Brighton are eighth on 15 points.
Trossard nearly found an equaliser when he tore down the left wing and towards goal but this time Ederson got the better of him and blocked the shot to force a corner. “The game was one of the toughest we could face as they proposed the type of game we are not used to, they played a game man to man and we were lucky to have the quality for the third goal,” City manager Pep Guardiola told reporters.Brighton fell behind to the type of goal City are not usually associated with, a long kick downfield from goalkeeper Ederson which landed at the feet of Haaland after a mix-up between Brighton keeper Robert Sanchez and defender Adam Webster.