After going eight games in all competitions without a goal following his close-season move from Wolves, Brazilian forward Cunha netted in the first half at Old Trafford to start repaying his £62.5 million transfer fee. Casemiro doubled United's lead before the interval and Bryan Mbeumo was on target in the second half.
Danny Welbeck's late goal against his former club and a stoppage-time effort from Charalampos Kostoulas came too late for Brighton to snatch a point. Mbeumo struck again at the death to give United three consecutive Premier League wins for the first time since February 2024 under Amorim's predecessor Erik ten Hag.
United's confident display maintained the momentum from last weekend's win against Liverpool and the success against Sunderland that preceded their first triumph at Anfield since 2016. That 2-1 victory against the Premier League champions had given Amorim a much-needed boost after a turbulent start to the season.