One of England’s brightest young talents fell out of favour in North London last season, making just 15 Premier League appearances and scoring no goals in the top flight.
Alli was left out of the Tottenham team on several occasions which ultimately accounted for his absence from the Three Lions squad in the ongoing European Championship.
The 25-year-old has however refused to blame Mourinho for his predicaments and instead channel his frustrations into working harder ahead of next season.
"The only person I blame is myself," Alli said to Goal.
"I should be performing at a level where it is difficult to not put me in the team or not play me.
"I don’t blame anyone but myself. Working with Mourinho was a great experience and one I learned a lot from.
"It has been a tough few years but I have been working hard and analysing what I need to do to get better.
"I have been training a lot on most days of my holiday. I didn't feel I needed much rest, so it is just training the whole way through."
Tottenham will be managed by former Wolverhampton Wanderers manager Nuno Esperito-Santo next season, and Alli is already looking forward to making his mark under the Portuguese.
The playmaker added: "He [Nuno] has done a great job at Wolves.
"I am looking forward to speaking to him and working with him. He is a great manager and it is exciting times.
"I want to make this year one of the best I have had. A lot of people have said I need to find the form I was in a few years ago.
"For me, I don't even want to get to that, I want to go past that and reach my full potential to be the best player I can be.
"Everyone is looking for that extra few per cent, so you have to keep up. I am feeling good and the best I have felt in a long time."
