The Chile global has now revealed that he left the Emirates on good terms with Arsenal manager Arsene Wenger, and exactly what the French coach told him in order to to try and convince him to extend his stay with the Gunners.
His move to United made him the first Chilean player in football history to play for Manchester United.
'He told me: "I want you to sign here because you are the best player in the team". "Arsene understood it at last, we ended up on good terms, he congratulated me and there was no problem".
The pair were fierce rivals and Rojo admitted to giving the former Arsenal man a good kicking
He also told Macarana Pizarro, the female journalist who interviewed him for Chilevision TV, that he was still suffering from Chile's failure to make the World Cup.
Having joined Manchester United only a few weeks ago from North London giants Arsenal, Sanchez revealed that he would love to return back to Chile at Universidad De Chile to end his footballing career.
"The more pressure I'm under, the better I feel", the forward said. The 29-year-old earns a fortune at Old Trafford, a reported £450,000 a week but has come under the criticism from the United faithful regarding his recent performances. "So, I don't want the fans to have lower expectations, I want the fans to have high expectations because I want the players to have high expectations too".
Manchester United will take on Brighton and Hove Albion in the FA Cup quarter-final at Old Trafford on Saturday afternoon.