Wenger angrily confronted Mike Dean and his match officials on the pitch, along with his goalkeeper, Petr Cech, to question the decision, while it is reported that he also entered the referees' room after the game. The Chelsea forward scored from the spot to make it 1-1 after Jack Wilshere had put the Gunners ahead.
However, it was the unlikely sources of Wilshere and Bellerin - with just two goals between them in all competitions this season at kick-off - who managed to find a way past Courtois.
There was still time for Chelsea substitute Davide Zappacosta to hit the crossbar but defeat would have been harsh on Arsenal who had 14 goal attempts to Chelsea's 19.
Chelsea remained in third place and one point behind Manchester United following their stalemate.
A few minutes later, Courtois was called into action at the other end with the Belgian shot-stopper producing a good stop to thwart Alexandre Lacazette from 12-yards out. The last shot should have been a goal.
Arsenal's defense was again inconsistent as the second half began, and Cech had to step in and save a couple Chelsea shots.
The Arsenal manager, however, admitted to being close to "shock" in the dying minutes of the match before his side drew level.
Bellerin somewhat made amends for conceding the penalty with a superbly taken volley to equalise in stoppage time after Marcos Alonso thought he'd won the game for the visitors in the 84th minute with a near-post finish. The game finished 2-2.
Hazard, with another effervescent display, scored the equaliser from the spot after Bellerin caught his foot with his studs.
"I've been in England for 21 years and I try to serve this game with honesty and integrity and when I have something to say I will say it". Castigating press for not talking about football, and not criticising refs, having himself willingly talked about refs, and then talking about how we have to accept refs have impossible job. Er...