By the end of his time at United, he did neither.
Sánchez, who is reported to be earning a basic wage of around £300,000 a week at Old Trafford, could make his first Premier League appearance for United against Tottenham at Wembley on Wednesday.
However, United have happy recent memories of visits to Wembley, including last season's League Cup final triumph over Southampton and the FA Cup win over Crystal Palace in May 2016. "So let's see what will happen".
That was nearly a month ago.
He is now being heavily linked with MLS side the LA Galaxy and Jose Mourinho will clear the path for a move if he wishes to head to America. "If he wants to become a very special player - he can do that - then he has to go in a certain direction".
Rose caused controversy last summer when he claimed that Spurs do not pay their players sufficiently and added that he would be open to leaving the club if he received an offer from a club that can regularly challenge for trophies. The side have been boosted with the inclusion of their new signing Alexis Sanchez.
At least that is what his national team coach thinks.
"I'm happy with his contribution, I think he's been a great professional for us and I know he wants to stay with us. That was the last thing I heard from him". "There will not be so much pressure on him defensively".
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"The difference now is the league is a lot more stable than it was 15-20 years ago".
He needs to show he is cut out for the physicality and intensity of the Premier League, which was the criticism aimed at him by Mourinho.
Despite indifferent results in the recent weeks, the North London side are undefeated in their last six league games and now sit in the fifth spot with 45 points.
Everyone at United was sad to see Mkhitaryan leave the club.
They were flashes of brilliance in an otherwise forgettable period of his career.
Sanchez made his United debut in the FA Cup last week in a 4-0 win over Yeovil Town, where he picked up an assist.
Harry Kane was Tottenham's saviour that day, and he will once again be expected to pose the biggest threat to United's backline on Wednesday night having already reached 30 goals for the season. Given the form Martial and Lingard are in, chances are high it will be Juan Mata.
What Manchester City would give to have Sanchez now.