Football fans have criticised Casemiro after his mistake in Manchester United's Premier League clash with Arsenal on Sunday.
The Brazil international has been deployed at centre-back for the match at Old Trafford, despite struggling in the same position against Crystal Palace earlier in the week.
Yet Casemiro's day has started badly, with the United star helping Arsenal take the lead.
The veteran played Kai Havertz onside, strolling up field instead of sprinting back, with Leandro Trossard then converting from close range.
Casemiro made a huge mistake in Man Utd's Premier League clash with Arsenal
SKY
With Casemiro enduring a nightmare season, his latest error has seen him come in for more criticism.
And fans on social media have now blasted the former Real Madrid star, with one user saying: "Casemiro is awful man. RETIRE."
A second said: "Casemiro is finished. He just needs to retire or something."
A third fumed: "Maybe time to retire for Casemiro."
A fourth stated: "Casemiro, for God sake man. That is NOT good enough. So lazy."
"This Casemiro downfall needs to be documented, this is absolutely horrendous," were the words of a fifth.
A sixth raged: "If Casemiro retires today I wouldn’t blame him."
And a seventh said: "Casemiro is dire. They've walked that in there. A mess now."
There's no denying that Casemiro is one of the best players of his generation, having won silverware aplenty during the course of his career.
But the United star is a player on the wane and talk of a move away remains ongoing.
Clubs from Saudi Arabia are believed to be keen on the 32-year-old - and whether they make an offer for him remains to be seen.
Casemiro is also unfortunate to be playing at centre-back as a midfielder by trade.
But that didn't stop the United star from being blasted by Roy Keane after his dire performance against Palace on Monday.
"Crystal Palace were really at it [against Manchester United] and everyone would look at it and think Palace away on a Monday night is going to be a tough night and Casemiro was isolated," he said.
"He was isolated by his own fault, because he wasn’t getting people around him, and you have to take responsibility for that.
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Casemiro was at fault for Arsenal's goal against Man Utd on Sunday
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"But if we’re talking about it being a team game, structure-this and structure-that, playing between the lines, that’s all well and good but when you’re up against it, you need your teammates around you. There’s the whole idea of playing in a team.
"Of all the players at Manchester United, including the reserves and youth team, if there was one player I wouldn’t play at centre-half against Crystal Palace, he’d be the one I wouldn’t play. Aaron Wan-Bissaka or someone else!"
He added: "Casemiro is the last player you’d want to play at centre-half against [Crystal] Palace, in his defence.
"Some players have all the experience, but they don’t show it at certain times.
"But look at the whole Manchester United squad, if you’re telling me one player I wouldn’t play at centre-half against Palace, who have something going at home, they scored five against West Ham recently, they’ve beaten Newcastle and they even scored two against City – it would not be Casemiro against them.
Arsenal celebrate taking the lead against Man Utd
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"I would play anyone else at centre back than Casemiro. When you get to 31 and 32, every time you have a really bad game, it becomes a shocker.
"I had people tell me that I was finished at that level, but players can get through it if they play in their best position.
"I looked at Casemiro the other night [against Crystal Palace] and he was having a bad time, but he wasn’t getting any help from the other players.
"If your legs are going a bit, you get people around you [to help] and that’s where he should’ve done better with his experience.
"But defensively, he got no help from anyone whatsoever. Defensively they were all over the place!"
