The right-back was messing around with goalkeeper Guglielmo Vicario's gloves before a corner.
Arsenal eventually went on to score three times in the first half, before Spurs pulled it back to a 3-2 loss at full-time.
Advertisement
Advertisement
A Pierre-Emile Hojbjerg own goal started off the scoring, before Bukayo Saka and Kai Havertz netted.
Spurs' goals came through Christian Romero and a Son Heung-min penalty.
However, they were unable to get anything from the contest, despite having the majority of possession.