Declan Rice sparked an Arsenal comeback by taking full advantage of a moment of madness from Robert Sanchez at Stamford Bridge.
Chelsea were cruising in the second-half against Arsenal after goals from Cole Palmer and Mykhailo Mudryk gave them a 2-0 lead.
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But a shocking error from Sanchez saw the Spaniard give the ball straight to Rice while he was off his line.
And the Arsenal star did not waste a moment to capitalise, executing a brilliant effort that sailed into the top corner.
The goal seemed to kick the Gunners back into life as they went up another gear, scoring the equaliser moments later.
Leandro Trossard netted his first of the season after coming off the bench, converting Bukayo Saka’s cross brilliantly at the back-post after ghosting unmarked into the box.
It came just seven minutes after Rice had grabbed an equaliser against the run of play.
Prior to the England international’s effort, Arsenal had not had a single shot on target.
Mauricio Pochettino’s men had done a fine job kettling in the likes of Martin Odegaard, Gabriel Martinelli and Saka.
But Mikel Arteta made crucial changes, including that of the Trossard who got the equaliser.
The arrival of Takehiro Tomiyasu for Oleksandr Zinchenko at half-time with the full-back struggling was also a massive decision that proved the right one.
Pochettino, on the other hand, lost his attacking bite when Raheem Sterling, Mudryk and Palmer went off.
The 2-2 draw meant that Chelsea went to ninth before Manchester United’s match against Sheffield United.
Arsenal, meanwhile, stayed in second and remain unbeaten in the Premier League.
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