Brazilian star Kaka has told Chelsea they have made a big mistake by sacking Phil Scolari so quickly. The A C Milan superstar was part of Scolaris World Cup-winning Brazil squad of 2002 and was also given his first cap by the axed Blues boss.Kaka said: I dont understand how a club that wants so bad to win titles can take such a bad decision as this.Just because Chelsea had a couple of bad matches. It was a big mistake. Im sure, in a few weeks or months, hell be coaching an even bigger club than Chelsea, The Sun quoted him, as saying.