One of the key battles that emerged very early involved United's captain on the day—Patrice Evra—and the fiery Uruguayan striker Luis Suarez.
In damning revelations, Patrice Evra has claimed that Liverpool's explosive forward used racist comments, and according to the Daily Mail, used them over 10 times during yesterday's game. The English publication also suggests that the word that was used was "n*****."
The French magazine has released the statement made by Evra, which is likely to be spread across most back pages in Europe today.
"I was very upset. In 2011 you can’t say things like this. He knows what he said, the ref knows it, it will come out.
"I won’t repeat what he said, but it was a racist word, and he said it more than 10 times. He tried to wind me up. I won’t make a huge deal out of it, but it’s very upsetting and disappointing."
Sky Sports have confirmed that the FA are looking into the allegations after referee Andre Marriner received a formal complaint.
"The Football Association have this evening been made aware of an incident that is alleged to have occurred during the Liverpool versus Manchester United fixture at Anfield today.
"Referee Andre Marriner was made aware of an allegation at the end of the fixture and subsequently reported this to the FA.
"The FA will now begin making enquiries into the matter."
Liverpool have already spoken out against the allegations, claiming that Suarez has "categorically denied" any involvement with such comments.
This is not the first time Evra has claimed to be on the end of racist comments, after getting in an altercation with Chelsea groundsman Sam Bethell in April of 2008, for which Evra received a four-match ban and a fine and Chelsea were dismissed of all claims.