Manchester United fans have taken to social media to criticise Casemiro for giving the ball away in the build-up to Everton's opening goal on Sunday evening.
Everton midfielder Amadou Onana dispossessed the former Real Madrid defender on the edge of United's box in the first five minutes of the game.
The ball then worked its way to Alex Iwobi - who curled the ball into the top corner of the net to give Frank Lampard's team the advantage.
United fans were furious with Casemiro - who was handed his first Premier League start under Erik ten Hag.
They took to social media to make their feelings known. One fan wrote: 'Casemiro absolutely dominated by Everton on that instance. Perhaps, he is NOT ready for Premier League, after all. #EVEMUN'.
Another fan added: 'How is Casemiro starting ahead of Scott McTominay. Laughable. He’s been so poor for us'.
Others joked: 'Casemiro thought it's LaLiga and he will get away with it'. Another one added: 'Casemiro isn't ready'.
Another fan Tweeted: 'Real Madrid veteran Casemiro being bullied all over the Goodison pitch'.
Another supporter said: 'Casemiro isn't getting the Madrid protection is he? Had that ben in LaLiga the ref wouldve whistled before he hit the deck.'
One added: 'Poor from Casemiro can’t stroll around with the ball like that didn’t have many options tho to play the ball but still poor'.
While another supporter questioned: 'How much did they [Manchester United] pay for Casemiro again?'.