Cristiano Ronaldo's reaction to Mo Salah's goal in Man Utd 0-5 Liverpool seen in footage | OneFootball

Manchester United endured one of the worst days in their history on Sunday evening as they were destroyed by Liverpool at Old Trafford.

Ole Gunnar Solskjaer's side haven't been playing well recently, though they did go into the game high in confidence after a dramatic midweek comeback against Villarreal.

But The Red Devils were truly outclassed by their fierce rivals.

United were smashed 5-0, with Naby Keita, Diogo Jota and Mohamed Salah (3) on the scoresheet for Jurgen Klopp's outfit.

There was no heroics from Cristiano Ronaldo on the evening.

The Portuguese forward has come to United's rescue a few times already since re-signing for the club but there was nothing he could do to prevent the humiliation.

Ronaldo cut a frustrated figure for most of the game and his emotions were plain to see after one of Salah's goals.

Footage captured Liverpool's players celebrating the goal, with Ronaldo in the foreground.

The 36-year-old could be seen flinging his arms around in frustration. His reaction is going viral and you can view it below...

It's not entirely clear what Ronaldo meant with his hand gestures but one thing is for clear: he really was not happy.

And he had every right to be frustrated. Man United were all at sea throughout the game and Liverpool were thoroughly deserving of their crushing victory.

Ronaldo took to Instagram after the game where he posted a defiant message.

He wrote: "Sometimes the result is not the one we fight for. Sometimes the score is not the one we want.

"And this is on us, only on us, because there’s no one else to blame. Our fans were, once again, amazing in their constant support. They deserve better than this, much better, and it’s up to us to deliver. The time is now!"

Time will tell whether United can get over the rut they are in.

They are currently seventh in the Premier League having won just four of their opening nine games.

That's simply not good enough for a side that were tipped to challenge for the title before a ball was kicked this campaign.