Ultimately Arsenal saved a point thanks to Bellerin's late equalizer.
There was more drama seconds from the end when Zappacosta's shot thundered off Cech's crossbar.It was error-strewn and exhilarating end to a back-breaking festive period for both sides.
In 63rd minutes, the goal was finally be seen.
It was manager Arsene Wenger's 60th match against Chelsea in his long Arsenal reign but few could have provided as much goalmouth action as this classic. "I think we should have won this game because of the chances we had".
On a positive note, Wenger again praised Wilshere for the way he has come back to form this season, after the midfielder put Arsenal ahead 1-0 with a fierce strike from a hard angle. Games are spoiled by factors you can not determine.
Shaun Botterill GettyImages
I say it's a farcical decision - you could give 10 penalties like that a game. You see good football, unfortunately, you see as well bad decisions. "It's nothing to do with football". You can listen to every interview I said.
When asked about the penalty decision, his mood appeared to turn dark as he added: "Look, since the start of the season it is what we have to take". The regret we have is that we have not the results that we could have had.
But speaking at a news conference ahead of the FA Cup match against Nottingham Forest, he said: "I maintain what I said in the press conference 100 percent, and I have nothing to change in that".
The Frenchman received a four-match ban for misconduct last January for pushing the fourth official after his team's 2-1 win against Burnley.
Three days before Christmas, also at The Emirates, Arsenal played a wild 3-3 tie with Liverpool - now in fourth place - in which it scored three goals in five minutes t wipe out a 2-0 deficit but then conceded an equalizer with about 20 minutes remaining.
"We've got to take each game as it comes, keep playing in this time, keep improving and we'll see what comes in March for the next worldwide games".
"It's odd because I don't like to speak about other coaches or players".
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