Alli's touch and vision have lit up the Premier League this season, no more so than when he scored a goal-of-the-season contender against Crystal Palace in January, but this is not the first time his impetuosity has been criticised.
The booking against Fiorentina was Alli's ninth in all competitions for Spurs and Pochettino indicated the time had come to speak to the player about his conduct.
"We need to try to teach him," the manager said.
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"He is a young player and he has a lot to learn about elite football."
Alli moved to Spurs from Championship side (second-tier) Milton Keynes Dons last February and while he is pushing for a place in the England squad at the European Championships in the summer, Pochettino said his education was far from complete.
"It is his first season in the Premier League at Tottenham. He came from League One, he needs to learn a lot," the Argentine said.
(Reporting by Simon Jennings in Bengaluru; editing by Amlan Chakraborty)
