@UtdEIIis wrote on X: "Casemiro is easily the worst player at the club he’s single handedly cost us this game."
Meanwhile, @LyesBouzidi10 joked: "The football left Casemiro and then lapped him again".
@AidanWalshMUFC attracted thousands of 'likes' when he wrote: "Like this tweet if Casemiro should retire today".
"Casemiro needs to retire after today," was @UTDTrey's view, while @LiamPaulCanning wrote: "Another season of Casemiro giving the ball away for fun. Nowhere near good enough."
@bethTmufc added: "Would rather play with 10 men than with Casemiro at this point he is an absolute liability."