Sunderland boosted their Premier League survival hopes with a deserved victory over an uninspired Manchester United.
Wahbi Khazri put the strugglers ahead after three minutes with a free-kick from the left that eluded everyone.
Anthony Martial levelled after he clipped the ball over Vito Mannone, who had parried Juan Mata’s shot.
But the Black Cats won it when Lamine Kone’s header from Khazri’s corner went in via a deflection off David de Gea to dent United’s top-four bid.
Sunderland’s win takes them to within one point of rivals Newcastle and safety after a game inspired by manager Sam Allardyce’s January signings.