The 31-year-old playmaker signed a new contract with the Red Devils this summer to keep him at Old Trafford until June 2021, with the option for United to add a further year.
Mata is a favourite amongst Manchester United fans after he signed for the club from Chelsea FC in a £37m deal back in January 2014.
His future at Old Trafford had been a source of speculation this summer after he was limited to just 16 starts in the Premier League last season.
Mata scored three goals and made two assists in the top flight for the Red Devils, and the playmaker has now lifted the lid on his decision to commit his future to the Premier League club.
Speaking in an interview with MUTV, Mata said: “The first thing is the feeling of belonging to this club. I think it is something special and unique.
“We know that in football there are three or four big clubs in the world, or in Europe, and United is one of them.”
He continued: “I have been here a bit more than five years and I have realised how amazing the supporters are and especially in the tough moments.
“I wanted to stay, I wanted to commit to the club, to keep enjoying wearing the shirt and keep trying my best.“
Manchester United will be aiming to break back into the top four next season after they finished sixth in the Premier League and without a trophy last term.
The Red Devils have not won the Premier League title since their final triumph under Sir Alex Ferguson back in 2013.
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