The contract confirms that United paid a club record fee of €75m to secure his services.
England international insists his actions during Europa League last-32 first-leg tie were not deliberate.
The 19-year-old offensive midfielder recently admitted he could extend his loan stay for a further season.
The 30-year-old defender was targeted by the Old Trafford club late in the transfer window.
Former Manchester United captain hopes Europa League win sparks revival in club's fortunes.
Adebayor returns to White Hart Lane this weekend as Tottenham host Crystal Palace in the FA Cup fifth round.
On-loan striker says he wants to establish himself in Diego Simeone's starting XI.
The 25-year-old forward made a dramatic return to first-team action against Leicester City.
The 43-year-old Argentine has impressed during his time at White Hart Lane.
Catalan giants looking to win eighth consecutive match in La Liga at Estadio Gran Canaria.
The Argentine has admitted the 19-year-old midfielder showed his lack of experience.
The 25-year-old Chelsea midfielder has struggled for form and fitness this season.
Granit Xhaka was subject to interest from Arsenal and Liverpool during the January transfer window.
Wayne Rooney picked up a knee injury and is expected to be on the sidelines for up to two months.
Vertonghen has not played since January after suffering a medial ligament injury.
Return leg of the Europa League round of 32 clash against Midtjylland will take place at Old Trafford on 25 February.
Manchester United face an uphill task to qualify to the last 18 of the Europa League following their loss.
James Wilson will remain on loan at Brighton and Hove Albion until the end of the season despite injury troubles a United.
Visitors failed to build on their 6-0 thrashing of Aston Villa with an uneventful draw at the WWK Arena.
The Spurs boss says he is delighted with the draw in Florence after Nacer Chadli's penalty.
Sergio Romero replaced the Spain international ahead of kick off.
Jurgen Klopp's return to Germany ends in a stalemate at the WWK Arena in Bavaria.
New Zealand striker out of action since 26 January after recurring hamstring issue.
Manchester United are also reportedly interested in securing his services.
The 32-year-old striker moved to Turkey in the summer after leaving Manchester United.
United take on the Danish champions in the first-leg of their last 32 clash.
Live coverage as the Europa League returns with Fiorentina vs Tottenham.
Quique Sanchez Flores may recall Costel Pantilimon to replace goalkeeper Heurelho Gomes.
The 49-year-old pundit is expecting an epic clash when the two teams come head-to-head in March.
The Denmark youngster says he did want to risk being demoted to the club's youth ranks.