The Tottenham Hotspur midfielder saw how the PL Kicks programme and the Tottenham Hotspur Foundation engage young people in positive activities as he presented Sivan Sherabayani with a specially commissioned comic strip.
The comic strip tells the story of Sivan, nominated by Tottenham Hotspur as their PL Kicks Hero, and his journey from playing football in the streets of Haringey, becoming one of the first PL Kicks participants in 2006, to becoming a professional coach.
"What he has done is an unbelievable story," Alli said. "He deserves a lot of credit and is a real inspiration to these kids. He has worked hard and they can see that he has done something with his life."
The PL Kicks Heroes campaign marks the 10-year anniversary of Premier League Kicks, which started in 2006 with four pilot projects and is now delivered by 68 professional clubs across the country.
The initiative develops young people's potential, while giving young people access to facilities, coaching and mentoring.
"A programme likes this is massive for this area," Alli said. "Not only does it gives the kids a safe environment to come and work with some top coaches, it also sets them up for the future and gives them a lot of opportunities to have a career.
"It gets the kids off the street. You never know what they could be doing nowadays so it's important that they are here in a safe place where they are with their friends."
Alli met youngsters who use the pitch every week as Tottenham Hotspur Foundation coaches took charge of a regular PL Kicks session.
Adoni, 11, has been a PL Kicks participant for the last four years and says the programme is an important part of his life.
"We all enjoy it," he said. "Friends and family come to watch you and you feel like you are a Premier League player.
"If I wasn't playing in Premier League Kicks, I would be at home on my phone and not being active. I would recommend this to children who want to play football. They should dream and believe that they can become a footballer and don't give up.
"I was very excited to meet Dele Alli. I was asking all sorts of questions and he gave me answers that inspire me to be a famous footballer. If I believe I can be like him."