Of course, Roman Abramovich has not accumulated almost £ 9billion through negligent spending, but his decision to sanction the signing of Drogba does represent a huge gamble. It is Chelsea's good fortune to have an owner who can afford to take such risks. There is no questioning Drogba's natural talent or the pace, strength and lightning-quick feet that brought him 29 goals in all competitions for Marseille last season, but whether he can provide such sustained excellence at the highest level of the game has yet to be proven.