United produced arguably its worst performance of the season, with Michael Olise scoring twice as Palace hammered Erik ten Hag's injury-hit side at Selhurst Park.

With Harry Maguire, Lisandro Martinez, Raphael Varane and Victor Lindelof all sidelined, Casemiro played as a makeshift centre-back alongside Jonny Evans and endured a nightmare outing. 

The Brazilian was beaten all too easily by Olise for Palace's opener, then was outmuscled by Daniel Munoz for Olise's second goal just after the hour mark.

Carragher believes the time has come for the five-time Champions League winner to step away from the top level, saying a move to MLS or the Saudi Pro League should be on the cards. 

"I think Casemiro should know himself, as an experienced player, that he should only have three games left at a top level," Carragher said in his role as Sky Sports pundit. 

"Then he should say, 'I'm going to head to MLS or Saudi'. His agent or the team around him need to tell him. We're watching one of the greats of the modern time.

"But I always remember something when I retired, a saying I'll always remember, 'leave the football before the football leaves you'. 

"The football's left him at this top level. He needs to call it a day at this level of football and move."

Casemiro has struggled throughout his second season at Old Trafford. Last campaign, the former Real Madrid star won possession 8.68 times per 90 minutes, on average, in the Premier League, also managing 1.44 interceptions per game.

Both of those figures are down this season, with Casemiro only winning possession back 6.14 times and making 0.84 interceptions per 90 minutes. 

Since the turn of the year, meanwhile, United have faced a Premier League-high 317 shots, while only West Ham (36.35), Luton Town (35.78), Burnley (31.88) and Sheffield United (31.6) have allowed opponents to generate more expected goals (xG) than their 31.47.

Ten Hag, however, refused to single out Casemiro for criticism after Monday's match, saying: "You can't put this down to one player, it's a team performance."

Casemiro has been dribbled past on 52 occasions in the Premier League this season, with only eight players being beaten by opponents more often in the competition.