They actually led on goal difference after beating us 3-1 but are back in second place now.
And Kyle Walker has warned everyone that City are firmly in the title race despite the setback.
He told reporters after the Forest clash: "That's the biggest blow.
"You do all that hard work and for a Manchester City side to have 36 per cent possession – to graft that out and put in a very solid performance at the Emirates against a tough team – to then come here and draw, we've thrown it away.
"We're not down and we're not out – we'll keep going and keep fighting until the very end and put this down as a blip.
"We know it's not acceptable as a team and hopefully now that's our blips done, and we can go on.
"It's not ideal [trailing Arsenal]. Obviously, we would like to be sat at the top and people trying to catch us, but Arsenal have done well this season – they play some good football and deservedly sit at the top but they're in touching distance."
The defender added: "We just need to make sure that these performances don't happen again, we finish our chances and defend well as a team, and we stick together."
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