Roy Keane warned Casemiro that he will be stepping into a disjointed dressing room at Manchester United prior to the win over Liverpool.
Confidence among the players will have risen significantly following Monday night's win, with United claiming their first points of the season and leapfrogging Liverpool in the table in the process.
The Reds travel to St Mary’s to take on Southampton this Saturday, when Casemiro could make his debut. The defensive midfielder, who has cost around £60m, was at Old Trafford to witness the victory over Liverpool.