Russia's Roman Abramovich and Maria Sharapova feature in a list of the most influential people in sport.
The 2008 rating published by American Business Week magazine puts the owner of English football club Chelsea at number six in the world, not far behind the top three – FIFA President Josef Blatter, IOC President Jacque Rogge and F1 boss Bernie Ecclestone. Maria Sharapova is in 25th place.