Dier, who recently talked up his "beautiful" partnership with Alli on the field, is confident that his compatriot will use the suspension as a chance to turn a corner and cut out his disciplinary issues.
"Dele is young and will learn from that mistake," he is quoted as saying by talkSPORT. "He knows it was a mistake. How many 20-year-olds have made mistakes? I am sure he will learn from it. I don't want to see him lose that edge and I don't think he should. That is what makes him great.
"I don't think you have ever heard [Mauricio Pochettino] saying he would take it out of him. Dele's a great player, you all know that. We're going to miss him like any team would but that's football, these things happen and there will be someone else ready to take his chance and take the opportunity."
Alli also missed the final three games of last season's domestic campaign after being punished for punching West Bromwich Albion's Claudio Yacob in the stomach.