The Chilean has endured a woeful 18 months at Old Trafford, scoring just five goals in 45 appearances and failing to justify wages thought to be worth up to £400,000 per week.
But the former Arsenal star is not resentful, despite struggling to contribute, standing by his desire to join United at the time.
“I’m very happy I went to Manchester United,” Sanchez told BBC Sport. “I’ve always said that. It’s the club that’s won the most in England.
“When I went to Arsenal it was fantastic – I was happy there – but United were growing at the time, they were buying players to win something.
“I wanted to join them and win everything. I don’t regret going there.”
Sanchez admits he struggled for rhythm at United under Jose Mourinho and Ole Gunnar Solskjaer, who both failed to give him a sustained run in the team.
“I think that I’m happy when I play for my national team,” the Chilean added.
“I was happy at Manchester United too, but I’ve always said to my friends: I want to play.
“If they would let me play I’ll do my best. Sometimes I’d play 60 minutes then I wouldn’t play the next game – and I didn’t know why.”
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