Juan Mata: Manchester United sign Chelsea midfielder for £37.1m
Juan Mata has completed his £37.1m move from Chelsea to Manchester United in a record transfer deal for the reigning Premier League champions.
The Spain midfielder had a medical on Saturday and has signed a contract, understood to run until summer 2018.
Mata, 25, is likely to make his debut at home against Cardiff on Tuesday.
"The time has come for a new challenge," he said. "I am excited at the chance I have to be part of the next phase in the club's history."
He added: "Chelsea is a top club and I have many friends there but you cannot turn down the chance to join Manchester United. I look forward to helping the manager and the team be successful in the coming years."
Mata, capped 32 times by Spain, will be unveiled at a news conference on Monday at 13:30 GMT.
He becomes manager David Moyes's second high-profile signing, following the arrival in September of Everton's Marouane Fellaini for £27.5m.
The deal also eclipses United's previous record signing - Dimitar Berbatov from Tottenham in 2008 - by £6.35m.