Jose Mourinho took a moment during his post-match press duties to praise West Ham's recruitment team for finding centre back Issa Diop this summer, calling the France Under-21 star 'a monster'.
Mourinho's Man Utd fell to an embarrassing 3-1 defeat to West Ham at the London Stadium in Saturday's early Premier League kick off.
Goals from Felipe Anderson, Marko Arnautovic and one deflected in off United's own Victor Lindelof sealed the defeat, despite a neat finish from Marcus Rashford.
Diop, who was signed by West Ham for a reported £22m from Toulouse in the summer was a key part in a resolute defence on Saturday, allowing the visitors just four shots on target.