Four: This is a great deal for Chelsea.
It's not often you can shift a guy who is surplus to requirements -- and, as long as Mourinho is in charge, he certainly is, rightly or wrongly -- and get more than $60 million back. For a club with serious Financial Fair Play issues -- we'll know in April how UEFA plans to proceed -- this is a very good offer.
Mata is 25, and though you're always playing percentages, right now at that price, you bite United's hand off. Come the summer, if Mata's playing time doesn't suddenly spike up and he doesn't go to the World Cup, his transfer price will plummet.
The problem with players in Mata's bracket is that because of their wages and fees, there is a very limited number of clubs who can afford them -- no more than eight or nine. And if for one reason or another they don't need someone with his characteristics or simply don't fancy him, you're looking at the next tier down of destinations. Once you're in that neighborhood, you're dealing with offers of $30 million ... max.