Kaka is upset with AC Milan management over accepting Manchester City's £108 million offer, it has been revealed.

The Mirror says Kaka has told his AC Milan team-mates he is "bitter" at being flogged to Manchester City.

The Samba superstar opened his heart to his Milan pals during an emotional meeting at Clarence Seedorf's restaurant in the city on Thursday night.

Kaka told them he feels betrayed that Milan are willing to cash in on him in a world record £108million deal after previously rejecting bids from Chelsea and Real Madrid.

The Brazilian responded to City's blockbusting offer by claiming he wanted to "grow old at Milan" and he is under contract until 2013.

The midfielder's switch to City, which has sent such huge shockwaves through the football world and beyond, is expected to be rubberstamped next week.