West Ham made it four wins out of four to qualify for the Europa Conference League knockout stages with two games to spare as Jarrod Bowen starred in a 2-1 victory over Anderlecht amid crowd trouble at the London Stadium.
David Moyes has targeted finishing top of Group B to avoid needing to play in a two-legged play-off after Christmas, and goals from Said Benrahma (14) and Bowen (30) put his side in control against their Belgian opponents.
Sebastiano Esposito's 89th-minute penalty set up a tense finale in a game which had already been ignited by unsavoury scenes involving both sets of supporters which could lead to UEFA action.
The Hammers are yet to cement their position at the summit, however, with Silkeborg's 5-0 away victory over Steaua Bucharest meaning they still require a point to be guaranteed of an automatic place in the last 16.
What's next?
West Ham return to Premier League action on Sunday when they travel to St Mary's to take on Southampton, with kick-off at 2pm.
The Hammers are then on the road again on Wednesday when they journey to Anfield for a clash with Liverpool, with kick-off at 7.30pm.