Scarlett bounced back after suffering a season-ending left knee surgery in 2019, and has now left no doubt on whether or not he should be promoted into the Spurs first team.
This season, the striker has played 23 games with the Spurs academy across two different age groups - u23 and u18 - recording 25 goals and four assists.
Scarlett, who has trained mostly with the Spurs first team this year, averages one goal or assist every 59.3 minutes in the academy.
First team debut
At the time of his debut in Europe, he became the club's youngest (16y & 247d) player to appear in a senior first team competitive game.
Alfie Devine would end up breaking Scarlett's record one month later by making his debut in Tottenham's FA Cup tie against Marine FC.
Spurs have secured Scarlett for two more years, as the 17 year-old officially signed his first professional contract in March, which runs until 2023.
''He's 17 and I believe next season he will be a first team squad player because he has a lot of talent,'' Mourinho said of Scarlett prior to his departure from the club.
He is going to be a fantastic player and I hope everything around him goes well. He is a striker, a number nine, I have been playing him from the sides similar to Marcus Rashford and is very clever.''
It will all come down to who the new manager is at Hotspur Way, but it will be interesting to see on whether Scarlett gets first team minutes next season or if Spurs send him on loan to gain pro experience.
It shouldn't surprise us if Tottenham sends him on loan though, just like they did with 19 year-old striker Troy Parrott, who made his Spurs debut in 2019 and had loan-spells at Millwall and Ipswich Town this season.