Roy Keane implored the Manchester United to give Erik ten Hag time and money after the Dutchman's first Premier League game in charge ended in defeat at Old Trafford.
Brighton took a 2-0 half-time lead thanks to two goals from Pascal Gross before United threatened a comeback when Alexis Mac Allister ended up putting the ball in his own net.
But United, even with Cristiano Ronaldo in off the bench, couldn't find an equaliser.