It looked like Chelsea had come from behind to triumph when Marcos Alonso struck six minutes from time, after Jack Wilshere’s first league goal since May 2015 had been cancelled out by an Eden Hazard penalty.
But the Gunners would not be beaten and Bellerin punished Alonso’s poor clearing header with a fine finish for a share of the points – though there was still time for Chelsea’s Davide Zappacosta to hit the crossbar.
Alvaro Morata had missed a glorious chance to give Chelsea a 14th-minute lead and the visitors were then indebted to a Thibaut Courtois save which pushed Alexis Sanchez’s shot on to both posts.
Wilshere broke the deadlock, but there were doubts over whether the midfielder should have been on the pitch.
Already booked, Wilshere went down looking for a free-kick on the edge of the area and might have received a second yellow card from referee Anthony Taylor for simulation.
The Gunners’ lead lasted just four minutes as Hector Bellerin was adjudged to have fouled Hazard, who equalised with the resulting penalty.
Alonso’s effort appeared decisive, only for Bellerin to strike.
Hostilities between the teams will be renewed in a week’s time, in the Carabao Cup semi-final first leg at Stamford Bridge.
Manchester City playmaker David Silva has announced his son is “fighting day by day” after being born prematurely.
Silva missed four of City’s five games prior to Tuesday’s Premier League win over Watford for what the club said were personal reasons.
The Spaniard posted a message on Twitter on Wednesday, which said: “I want to thank all of you for the love and good wishes received in the last few weeks, special thanks to my team mates, the manager and all at the club for understanding my situation.
“Also I want to share with you the birth of my son Mateo, who was born extremely preterm and is fighting day by day with the help of the medical team.”
COMUNICADO OFICIAL: pic.twitter.com/8Ooaef92ro
— David Silva (@21LVA) January 3, 2018
Manchester City returned to winning ways by easing to a 3-1 victory over Watford at the Etihad Stadium.
After seeing their 18-match run ended by a goalless draw with Crystal Palace, City needed only 38 seconds to find the net through Raheem Sterling.
A Christian Kabasele own goal soon made it two and Sergio Aguero’s third made sure of the points before Watford grabbed a consolation through Andre Gray.
Tweet of the match
Star man – Kevin De Bruyne
Probably the best news of the night for City was that De Bruyne was fit to start after Jason Puncheon’s horror tackle.
And the Belgian was at the heart of nearly all City’s best moments. He would have had a goal, too, but for a fine save from Heurelho Gomes, who tipped his first-half free-kick onto the bar.
Stat of the match
When Kabasele turned in De Bruyne’s cross he became only the seventh player in Premier League history to suffer the misfortune of scoring an own goal in the 13th minute of a game.
Moment of the match
After the disappointment of seeing their winning run come to an end on Sunday, an early goal was just what City wanted, and it could scarcely have come any earlier or been any more simple.
Just 38 seconds after kick-off, Leroy Sane sprinted away down the left and crossed for Sterling to tap into an empty net.
Ederson 7 (out of 10)
Kyle Walker 7
Nicolas Otamendi 6
John Stones 7
Fabian Delph 6
David Silva 7
Kevin De Bruyne 9
Raheem Sterling 7
Leroy Sane 7
Sergio Aguero 7
Danilo (for Stones, 67) 5
Yaya Toure (for Fernandinho, 71) 5
Bernardo Silva (for De Bruyne, 79) 5
Heurelho Gomes 6
Daryl Janmaat 6
Molla Wague 5
Christian Kabasele 6
Marvin Zeegelaar 5
Abdoulaye Doucoure 5
Ben Watson 5
Andre Carrillo 5
Etienne Capoue 5
Andre Gray 6
Tom Cleverley (for Capoue, 61) 6
Roberto Pereyra (for Watson, 61) 6
Jerome Sinclair (for Richarlison, 82) 5