New Manchester United midfielder Nemanja Matic intends to repay Jose Mourinho's faith in him as he targets Premier League and Champions League success.
The 28-year-old Serbia international has been signed by the Portuguese for a second time, having been brought back to Chelsea by him in 2014 after initially being sold by Carlo Ancelotti in 2011.
Matic leaped at the chance to be reunited with Mourinho, whom he believes will continue to improve him.
"Manchester United is one of the biggest clubs in the world (but) also my wish was to train with Jose," he said. "Of course when you have a coach like him and a club like Manchester you don't need to think a lot so my decision was very easy.
"I am very happy because we will work again together. He is a great coach and I improve if I work with him.
"When the coach wants you to come to the club, it gives you more motivation, more possibility and I will give my best to show that I deserve to be in this club."
Matic has signed a three-year deal after completing a £40m move. He has already set his sights on replicating the success he had at Stamford Bridge, where he won the league twice - once with Mourinho.
Matic added: "I think that this squad is ready because it is more mature. They have already worked with Jose for one year so they know what they have to do and I am sure that this season we can do many things.
"I'm sure that we will try to win the Premier League. Also, the Champions League, you never know what can happen."
Mourinho underlined how important he believes Matic is for his vision. He said: "Nemanja is a United player and a Jose Mourinho player. He represents everything we want - loyalty, consistency, ambition, a team player.
"I thank him for his desire to join us because without that, it would be impossible to have him here. I am sure our players and supporters will love him. A big welcome to our new No.31."
Meanwhile, Uefa have announced that Phil Jones has been banned and Daley Blind fined for breaching anti-doping regulations after United's Europa League final triumph in May.
Defender Jones has been suspended for two matches for verbally abusing a doping control officer after being selected for testing following the match against Ajax in Stockholm on May 24.
Jones, who was also fined €5,000, will miss the Super Cup match against Real Madrid next week and United's first Champions League group stage game.
It is understood Jones was upset at having to miss out on celebrations and a squad photograph paying tribute to victims of the Manchester terrorist attack.
Blind was fined €5,000 (£4,480) for not immediately reporting for a test while United were fined €10,000 (£8,962) for the breaches. There is no suggestion that either player was guilty of doping.
Dutch defender Blind's punishment may have arisen from confusion. He did celebrate with the team and feature in the photograph but did so accompanied by a chaperone. He believed this was permitted, as it is in other competitions. In this instance, however, it was not.