Beckham tries to keep his private life separate from his football career but such is the media interest this has become a difficult balancing act for him.
Should Real Madrid agree to sell, a prospective buyer has to work out the following equation before deciding whether to bid.
Does Beckham's marketing value - Peter Kenyon knows all about this - combined with his contribution on the pitch outweigh the kind of considerations that persuaded Ferguson to sell him? In other words, would he sell a lot of Chelsea shirts in Asia?
No prizes for guessing that Roman Abramovich's answer will be 'yes'.