Tottenham duo have their own secret signals...
The duo saluted each other as Alli was substituted in the 83rd minute in the 3-0 win over Fiorentina.
Both players played important roles keeping Tottenham's system in shape with captain Harry Kane absent through injury.
The team spirit at Spurs looks good, and they all appear to be great pals off the field, no doubt a key factor in their success on it.
The only down side of the night was Alli's booking, meaning he will miss the first leg of the next game in the Europa League.
Tottenham were knocked out of the competition by Fiorentina last year, and their comprehensive win this time around shows their improvement over the past 12 months.
Teenager Alli has been one of the club's best players this season while Chadli is finding form after a spell on the sidelines.