City have won eight of their nine Premier League games this term, scoring a remarkable 32 goals, to open up a five-point gap at the top of the table.
Reigning champions Chelsea, meanwhile, have already lost three games and find themselves nine points adrift of City.
But the Blues were in a similar situation last term before going on to win the league by seven points and Cahill has called for ‘calm’ as they look to build on Saturday’s narrow win over Watford.
‘Last season we were eight points behind Man City and we managed to claw it back,’ England international Cahill said.
‘I’m not saying it is going to happen, but we need to calm down and get back to it. We are champions of last season, in the middle of October, there are loads of games to play.
‘Man City have loads of tough games to play, Man United and everyone else have massive games to play.
‘I still think it is open. If Man City keep smashing people, then they are going to go on and win the League deservedly.
‘It is difficult to maintain it for such a long period and if they do – or whoever does do that and it was us last year – they deserve to win the league.’
Chelsea have failed to hit top gear in recent weeks but clinched a much-needed victory over Marco Silva’s Watford at Stamford Bridge on Saturday.
The west London outfit had been trailing 2-1 but fought back well to seal a 4-2 win and a crucial three points.
‘The performance was good because to concede the equaliser at the end of the first and then go down in first part of the second half, our confidence in that moment was low,’ Conte said.
‘But my players showed me we have the attitude to fight and change the situation and get a different result. It was very important.’