Firmino's equaliser didn't keep the Reds on level terms for long though.
Leroy Sane put City back in front in the 72nd minute at the Etihad.
The Germany international drove at the Liverpool defence before hitting the ball across Alisson as the ball came off the post and ended up in the back of the net.
City managed to hang on and close the gap at the top of the Premier League table to just four points.
Liverpool stars Andy Robertson and Roberto Firmino celebrated in opposite directions (Image: SKY SPORTS)
Liverpool ace Andy Robertson wheels away to celebrate his assist (Image: SKY SPORTS)
The title showdown was an enthralling contest throughout with both teams looking to secure all three points.
Liverpool very nearly took the lead in the first half but goal-line technology ruled the ball to be 11mm away from crossing the line.
Then Vincent Kompany was perhaps lucky to get away with just a yellow card for a rash tackle on Mohamed Salah.
That was before Aguero gave City the lead.
Invalid email
We use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time. Read our Privacy Policy
Liverpool forward Roberto Firmino was on target (Image: GETTY)