His 'owner' Kia Joorabchian:
"We tried in the last couple of months to do it very quietly and quickly and I'm very happy, we're all very delighted it has come out to be a victory for everybody in this case.
"He made it clear he was very happy last year but he knew the ambition had come now to progress and he's absolutely thrilled to move on. He's very happy that he left West Ham on a good note.
"And he's absolutely thrilled now to join Manchester United and hopes that will be his club for a long time to come."
Ferguson:
"We're delighted it seems to have been sorted. He trained with us on Friday morning and did very well considering he's had three weeks off since the Copa America. He did a good bit of work and was very enthusiastic. I think it will be Wednesday when we see him play."
Alan Curbishley:
I'm disappointed he didn't want to come back to us. We tried but he decided his future is elsewhere. So all I can say is thanks for what he did.
"I don't believe he was the only player here last year but obviously had a big say in things.
"He knew we were keen for him to stay, but once Manchester United came in he decided his future was elsewhere."