Tottenham manager Mauricio Pochettino said he had not seen the incident, but added after the game: “Sometimes the opponents find him and try to provoke. They know he has a strong character and may react.”
Off-the-ball incidents missed by the officials are referred to a panel of three former elite referees to decide on any sanction.
Alli has been a hugely influential figure in his debut season for Tottenham. The former MK Dons player has scored 10 goals so far and has formed an impressive partnership with striker Harry Kane.
Second-placed Spurs are seven points adrift of Leicester with three games left. The Foxes can win the title on Sunday with victory at Manchester United.