Inside Man Utd's infamous clash with Liverpool that "could have caused a riot"

Manchester United's meetings with Liverpool are hardly ever friendly, but the animosity in the air at Old Trafford on February 11, 2012 was arguably unparalleled.

The clash marked the first time the two sides had faced off since Liverpool's Luis Suarez had been found guilty by the FA of racially abusing United defender Patrice Evra at the corresponding fixture at Anfield earlier on that season.

It was an incident that left Evra deeply shaken, with the Frenchman revealing he had received death threats while the FA conducted their investigation into Suarez's remarks.

"They were opened by Barry Moorhouse, then the player liaison officer and long-time United servant. 'Pat, this is a really serious case,' Evra told Sportsmail.

"One was from a man in prison who said that the first thing he was going to do when he got out was kill me.

"The police came and told me they had to take it seriously. For two months, I had 24-hour security in front of my house."

Eventually, the FA concluded their investigation and the Uruguayan forward was banned for eight-games.

It just so happened his first fixture back after serving the suspension came in the form of another meeting with Evra and United - four months on from the clash at Anfield.

In between that time, Liverpool had already sparked backlash after warming up in their infamous t-shirts issuing support with Suarez despite his comments.

Tensions were high as both sides lined up inside the Old Trafford tunnel, Suarez and Evra just metres apart from each other ready to do battle.

As is customary before every Premier League fixture, players from the home side will stand in a line while their visitors make their way down the team shaking hands with each of their opponents.

Every