Manchester United chief Sir Alex Ferguson admits the fee being offered by rivals Manchester City for AC Milan's Kaka is staggering. For the Scot, it is the sheer enormity of the sum, well over double the most any club has paid for a player in the history of the game - Zinedine Zidane's move from Juventus to Real Madrid for £46million in 2001.

"I find it hard to get my head round to be honest," he said. "It is amazing.

"Football is football. From time to time you get shocks and surprises. This is surprising everyone."