Mauricio Pochettino will warn Dele Alli to be on his best behaviour and forget the hand signals as the Tottenham midfielder prepares for his first reunion with referee Clement Turpin.
Alli was banned for one game for a middle-finger gesture during a World Cup qualifier against Slovakia in September which FIFA initially feared had been aimed at French official Turpin.
England were able to mitigate the punishment by claiming the insult had been aimed at team-mate Kyle Walker not the referee.
'It's important to be aware,' said Pochettino ahead of Spurs' Champions League tie at Borussia Dortmund.