I’d say ”I thought I would spend my career at Barcelona, but everyone knows the financial issues there and the problems with ffp. Just like with Messi last year, it made it impossible for me to stay.
However I informed the club that if I was to move, I was only interested in a move to Manchester United, to team up with the manager again. I was in constant contact with Erik and it’s been a long and frustrating process but I’m happy we finally got the deal through and I’m very excited to be here blah blah blah…”
I’d then add in how “Erik played me in my best position, something I never really had the opportunity to play at Barcelona” and about how “we spoke about his plans for me here, which made me know this was the right place for me”
Oh, and what a surprise there was no interview telling us he wants to stay & renegotiate his deal.