Ferdinand is determined to prevent their rivals from winning the Premier League title.
“This city isn’t big enough for two big teams,” said the England international.
“City have loyal supporters that have been crying out for success. They haven’t had it, but maybe now they think their time has come with all the money invested.
“But money doesn’t buy success sometimes. It can do, as you’ve seen at Chelsea, but they started from finishing fourth, fifth and third in the league.
“City are starting from a different position, so time will tell how successful they will be. If they win something this season, then good luck to them – but hopefully we’ll be the ones winning big trophies.”