The arrival of the Russian at Stamford Bridge saw an influc of big-name players join the Blues.
Rooney told The Daily Star: “When Roman Abramovich went into Chelsea and all of that money was pumped into them and they won the two league titles, it looked hard to beat them.
“But fortunately we stopped them from winning the league for a third year running and we have really kicked on as a club.”
“Look at the bench we had at Arsenal,” he continued. “We had the likes of Ryan Giggs, Scholesy [Paul Scholes], Carlos Tevez and Dimitar Berbatov.
“Unbelievable.”
