Jose Mourinho opened up on how his public persona differs to his personal life, and insists his successes at Manchester United were not fully appreciated.

In an exclusive interview with Sky Sports News, Mourinho spoke candidly about his time at Old Trafford, and believes winning the Europa League in 2017 and finishing second to 100-point Manchester City in 2018 constituted real success.

The 56-year-old, who holds a higher Premier League win percentage than Jurgen Klopp, Mauricio Pochettino and Arsene Wenger, is enjoying time out of the game after leaving United in December, and gave a fascinating insight into his character off the pitch.

Asked why his persona differs on and off the pitch, Mourinho said: “It’s probably my fault. I am very closed. When I am working I need my loneliness. The football manager on many occasions is a lonely man. Lonely with his thoughts. Lonely with his feelings. Lonely with his decisions. You can have staff and people that work with you but the key word is decision, only one in charge of decision-making.

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“So maybe it’s my fault because the tendency is to close myself in a shell. Then also my fault because what people see is the 90 minutes. The way you behave in the game, the way you appear on camera. People who see me in street say: ‘Oh you look younger. Oh I thought you were a little bit fatter, you look slimmer. Oh you are taller, we thought you were small’.

Mourinho celebrates at the end of the Europa League final victory over Ajax Mourinho celebrates at the end of the Europa League final victory over Ajax Mourinho celebrates at the end of the Europa League final victory over Ajax

“So I think TV changed the perspectives.

“I am what I am. I don’t act. I see people acting. I don’t act. Everything is natural. When I’m on the bench and don’t celebrate a goal it’s natural, I am focused on what is coming. It’s natural when I grab the bottles of water and throw them. It’s natural when I kick a bottle. What you see is what it is. If I have reason to smile, I smile. I love to smile. I cannot explain.”

Mourinho arrived at Old Trafford in 2016 – “the job that everyone wants” – winning the EFL Cup and Europa League in his first campaign.

Jose Mourinho's win rate compared to rival Premier League managers Jose Mourinho's win rate compared to rival Premier League managers Jose Mourinho’s win rate compared to rival Premier League managers

He says the second-place finish in 2017/18 was an even bigger achievement, but admits he was surprised at the criticism he received and thought the success deserved more credit.

“I can just say that the Manchester United time was not an easy time. I always felt that to win the Europa League was fantastic and it didn’t look like it was, the way people approach it.

“To finish second was even more than that [success], so probably I was feeling a little bit like: ‘Wow, I’m working well, I’m giving everything and I’m not getting what I think that deserves’.

“The only thing I can promise you is that when I have the next club, the next project, I will be so, so happy that I will walk into that press conference with a big smile. That I can promise.”

After winning an unprecedented Champions League with Porto in 2004, a year after UEFA Cup success, Mourinho arrived at Stamford Bridge 15 years ago with credit in the bank.

Sky Sports News will have more from Mourinho throughout the week, plus on Monday we'll bring you an hour-long special from our day with the two-time Champions League winner Sky Sports News will have more from Mourinho throughout the week, plus on Monday we'll bring you an hour-long special from our day with the two-time Champions League winner Sky Sports News will have more from Mourinho throughout the week, plus on Monday we’ll bring you an hour-long special from our day with the two-time Champions League winner

Fifteen years after his first press conference at Chelsea, Mourinho explained how he came to label himself a “Special One”, and though he insists the context of the original label was slightly altered, he had no problem with it sticking.

“When I gave my first press conference I was asked if I was ready for the Premier League. I thought: ‘What? I just won the Champions League and you are thinking that I am nobody?’

“So, I went a little bit aggressive by saying I am not one from the bottle, I am ‘a’ special one. But then, bang, it stayed. No problem.”

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