Dier headed home Christian Eriksen's free kick with half an hour on the clock before Heung-min Son won a penalty minutes later, which Kane converted to make it 2-1 to the Lilywhites in the 34th minute.
"Of course in that moment it was tough for the team and we started to pay for the effort from the Champions League game against Inter Milan and Chelsea and we started to suffer".
That Arsenal finish strongly, overwhelming often exhausted opponents, is undeniable.
Emery has a strong bench to use, and bringing on players of the calibre of Lacazette and Ramsey is a luxury few teams even among the big six have.More news: Cameroon Lose AFCON 2019 Hosting Rights Over Poor Preparation
With the Gunners facing the prospect of having to play nine games over a period of just four weeks, Ozil will be expected to adapt to Emery's new tactical approach or risk being left out of the squad altogether.
The England midfielder celebrated by putting his finger to his lips, with Arsenal substitute Stephan Lichtsteiner reacting angrily to the gesture and referee Mike Dean showing Dier a yellow card.
Exhausted legs may even have contributed to Jan Vertonghen's lunge for the ball that earned a second yellow card five minutes from time.
The unrest was not restricted to the stands as the two sets of players had to be separated following Dier's equaliser on a feisty afternoon in north London.
The manager had to deny claims of a falling out when Ozil sat out a win over West Ham in August, citing illness.
Time will tell if Arsenal can return to the Champions League after a two-year absence.