Mata won the FA Cup, the Champions League and the Europa League during
his time at Chelsea and looks back fondly upon his two-and-a-half year
spell in west London.
"I always said I was very grateful for Chelsea," he said. "I spent an amazing time of my career there, we won a lot of trophies, and I think I became a better player. I have great friends in the club and I always wish the best for them."
And at Old Trafford, Mata admits he has the confidence of his manager that he was lacking in his final few months at Chelsea.
"I think the key is to feel the confidence of your manager and the confidence of your team-mates." he said. "And to feel important. Everyone wants to feel important wherever they are and right now I feel I am a very important player within the club.
"I am happy with the fans, with the club, with everyone. I'm enjoying the moment and I think that helps you to play better football and to perform better."
"I always said I was very grateful for Chelsea," he said. "I spent an amazing time of my career there, we won a lot of trophies, and I think I became a better player. I have great friends in the club and I always wish the best for them."
And at Old Trafford, Mata admits he has the confidence of his manager that he was lacking in his final few months at Chelsea.
"I think the key is to feel the confidence of your manager and the confidence of your team-mates." he said. "And to feel important. Everyone wants to feel important wherever they are and right now I feel I am a very important player within the club.
"I am happy with the fans, with the club, with everyone. I'm enjoying the moment and I think that helps you to play better football and to perform better."
