Arsenal legend Paul Merson took to social media to make fun of Manchester United supporters after their 4-0 defeat to Crystal Palace on Monday night. The Eagles were fully in control of proceedings and scored the opening goal through Michael Olise in the 12th minute.

They led 2-0 at the break, thanks to Jean-Philippe Mateta. United looked dead and buried as more misery was piled on Erik ten Hag's team. Tyrick Mitchell then scored the third before Olise bagged his second of the evening.

Despite the result, United remain eighth in the Premier League table, level on points with Chelsea in seventh and five points from West Ham in ninth. While it may have been a night to forget for the Red Devils, it was certainly one that many Arsenal fans cherished.

Merson was one of them, taking the opportunity to plug a website when mocking United. Quote retweeting United's post after Olise had bagged his second, he said on X: Any United fans struggling to sleep tonight, remember code Merson40 will save you 40% at http://supremecbd.uk."

At full-time, he added: "I’ll give you that advice 4-nothing," followed by a laughing and football emoji.

United boss Ten Hag admitted the defeat was their worst of the season. "It is very disappointing," he said. Under-performing. Definitely the worst defeat, We should have done better.

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"We are aware, as a team performance, we were not correct, making big mistakes and not following the plan and the script and the rules we have. There was one issue but also on the left side, there were two players doubling up on one player. That's very poor defending."

With Casemiro heavily criticised for his performance, Ten Hag insisted the whole team was at fault. "You can't put this [down to] one player. It's a team performance," he added. "The throw-in when you concede the first goal, that shouldn't happen.

"That's the team because we don't follow the rules, we don't adapt to a slightly different situation, to organise, to keep control in that situation. Five players over the ball and they have a throw-in, it's not possible.

"It's clear, it's obvious, this is underperforming. We didn't act how we wanted to and it's not good enough. We are very disappointed. Our fans were behind us and we should have kept fighting like the fans did."