Late Marcos Alonso goal denied Manchester City’s to put their Premier League title party on hold on Saturday.
Raheem Sterling gave the home side the lead at the empty Etihad Stadium just before half-time but Hakim Ziyech levelled in the second half and Marcos Alonso bundled in the winner in the dying seconds.
The point lifts Chelsea into third spot, six clear of fifth-placed West Ham with just three games to go.
Aguero had a glorious chance to make it 2-0 from the spot moments later when Billy Gilmour fouled Gabriel Jesus, but the Argentina striker opted for a dinked effort that was easily saved by Edouard Mendy.
It proved a costly miss, as Chelsea improved after the break and equalised when Cesar Azpilicueta set up Hakim Ziyech to fire home from the edge of the area.
The visitors had two more efforts ruled out for offside before Marcus Alonso won it for them in injury time, meeting Timo Werner’s pull-back and sending the ball looping over Ederson.
City could be crowned champions before they play again. Manchester United face three matches before Guardiola’s men are next in action, against Newcastle on Friday
This was Chelsea’s second win over City in the space of three weeks, following their victory in the FA Cup semi-final at Wembley in April.
The two sides will meet again in the Champions League final in Istanbul at the end of this month.
