Alli, 20, received a straight red card for his horror tackle on Gent’s Brecht Dejaegere during the Premier League club’s shock Europa League exit.
Alli speared his right foot high into Dejaegere’s shin. The Belgian midfielder was able to continue initially but had to be substituted, limping off with a bloodied shin.
Alli will miss the first three games of next season’s Champions League if Spurs qualify for the tournament again.
Gent earned a 2-2 draw and 3-2 win on aggregate in the last 32 tie.
