Tottenham Hotspur manager Mauricio Pochettino says he will warn Dele Alli to be on his best behaviour during Tuesday's Champions League clash at Borussia Dortmund.
Pochettino's caution follows the news that the match at the Westfalenstadion will be officiated by Clement Turpin, who was refereeing the World Cup qualifier when Alli was caught making a middle finger gesture.
"I didn't know," Pochettino admitted after finding that Turpin was the referee involved in the incident. "It's important to be aware.''
Alli appeared to direct the gesture at Turpin during his country's 2-1 win over Slovakia on Sept.