Harry Maguire says he joined Manchester United to help the club return to the top.
The England international made the move from Leicester City to Old Trafford for a fee of £80m, making him the most expensive defender in the history of the game.
"I was in a situation where there was a long-term contract at Leicester, they wanted to keep me, Manchester United wanted to buy me, and hopefully it turns out a good piece of business for both clubs," he told Sky Sports.
"That's my main aim now, to prove my worth to Manchester United, not just individually with performances but as a team. I want to improve this team and get it back to where it should be."