The Observer says the staggering potential salary dwarfs David Beckham's on-field earnings at LA Galaxy and any previous pay for a player anywhere in the world. It would also cause Chelsea's current highest earners to seek their own increase, as would others in the top flight, where it is thought the highest-paid stars currently receive around £130,000 a week.
"Kaka's contract gives him €9million in its first season and rises by a million euros for each of its five years," a Milan source revealed. "To better that, Chelsea will have to begin at more than £200,000 a week."
With a similar step arrangement likely, during the course of a five-year deal at Stamford Bridge Kaka would expect to see his wages rise to at least £250,000 a week and he "has been offered a considerably bigger offer than Milan's", a source close to the player also told the Observer.
Milan are conscious that, with a month of the transfer window remaining, the deal should happen as soon as possible so they would be able to reinvest what would be a sizeable fee in the players needed to rebuild after failing to qualify for the Champions League this year.