The agent of Manchester United striker Wayne Rooney feels he's far from reached his commercial potential.
Rooney has been the face of commercial tie-ins for boot-sponsors Nike as well as the likes of Ford, Asda and Coca-Cola.
Paul Stretford told the Daily Mail: "If I was looking after Rory McIlroy for instance and I tie up a deal in Korea and I want him to be in Korea on Wednesday to sign a contract and take a picture, within reason, provided Rory's happy, that's what would happen.
"But with Wayne you can't do that because you've got training, you've got games, you've got a very long season. At all times you can't lose sight of the fact of what it is that makes him the commercial clothes horse that he's become.
"Manchester United are probably the most progressive at exploiting as much as they can out of those amount of days, and even they don't use all that standard Premier League contracts allow you to do."
