"Since I came to United, it's been a whirlwind four years that have passed so quickly".
He said on the club's official app: "I'm very proud and happy".
Alexis Sanchez looks like he may have the fate of a Spinal Tap drummer - turn ups, plays an instrument, promptly disappears. From signing today now it's all about looking forward and to how much I can help the team and become a success again.
'It is a bit odd when you come back from the global week but I think the feelings of the last match remain so the players are fine, are happy and focused on the match'. I'm not sure if he works hard enough but he's still a young man who has done well and scored a lot of goals.
Here, we trace how one of English football's brightest young talents escaped from the crosshairs and got back on track.
Mourinho has condemned Shaw's attitude and focus in the past while he questioned the tactical awareness of the defender following an FA Cup win over Brighton in March.
Barcelona made quite the splash for a few midfielders in the summer in order to replace their Spanish veteran Andres Iniesta who left to play in the Japanese league but despite that Manchester United superstar Paul Pogba was still linked with a move.
"I think I knew how important this season was going to be, especially the start of it coming in the past year of (my contract)", he said.
"I know he has qualities and has been a good player, but I never saw him as a United player", Scholes told ESPN.
"I see this team-mate make this run just for me when I'm not in the position; it just gives you energy to make the run too, to tackle to make the space for the other one too. That's what I'm going to be doing". "I think (Mourinho) still is (a great manager), but you wonder why his side keep getting outplayed", he added.
The news brings to an end a year of speculation about Shaw's future at the club, following a rumoured falling-out with Mourinho.