Despite having won just one of their past four outings in all competitions, Cech is confident that Chelsea can return to form soon before taking on league leaders City and getting a good result.
"So far, City have been doing very well and it's why they are where they are," he said.
"But there is a long way to go - we still have to play them twice.
"We can't forget that, last year, we had a brilliant start, then a difficult period but had a brilliant finish and could have won the title.
"There is a long way to go - anything can happen - especially in the Premier League.
"Obviously, our opponents have an advantage at the moment, but we have to keep working, get the wins and see what's going to happen."