Alli, who won PFA Young Player of the Year awards in 2016 and 2017 and has played 31 times for England, added that the Argentine boss has been important in his development.
"They have confidence in me, yes of course".More news: Portage County elections warning to absentee voters on ballot return
"I'm very thankful to the Club, happy to finally sort it out", Alli told the official Tottenham website.
"It is about the club, it is about many things". My feeling is that it is going to be hard to repeat some players.
"You need to feel you are going to play of course but it is about wanting to play for Tottenham".
"I can't think of a better place for a player of my age and where I am in my career, to have such wonderful support and coaching staff to help me to keep improving".More news: Trump announced a trade agreement with China
The 25-year-old, who moved to Spurs from MK Dons in 2015, admitted the White Hart Lane boss played a big part in his decision. "I think I'm at a great place to do that". It is nice to hear the player say one of the reasons is the manager or the chairman or the new stadium is so exciting. The fans and the club are awesome, the players as well, we've got a special bunch of boys and everybody gets on really well.
Spurs became history makers in the summer when they were the first club since the transfer window's inception not to sign any players and Pochettino thinks January might be similar. We could have got what we got, or a draw or a win.
"You knew that one goal could change the dynamic".
"We came from Manchester City when we ran more than 120km and West Ham was similar and this was the same".More news: Brazil Elects 'Proud Homophobe' Jair Bolsonaro As President