Chelsea's best transfers of all time: From Hazard and Drogba to Zola and Lampard

Chelsea became kings of the transfer market under Roman Abramovich's ownership, as they revolutionised the sport with their big spending.

However, even before the real riches arrived at Stamford Bridge, the Blues were able to make some spectacular signings on a more modest budget.

As such, GOAL picks the best 10 transfers in the club's history...