The England midfielder feels Spurs missed a great opportunity to beat their local rivals after throwing away a two-goal lead at the Emirates Stadium
A lack of maturity cost Tottenham all three points against Arsenal in the north London derby on Sunday, according to Dele Alli.
Spurs opened the scoring with just 10 minutes on the clock at the Emirates Stadium, when Christian Eriksen tapped in a close-range rebound after Bernd Leno failed to hold a tame Eric Lamela shot from outside the box.
Harry Kane doubled the visitors' account from the penalty spot 30 minutes later, after Granit Xhaka was punished for a reckless tackle on Son Heung-min in the box.