4) Carlos Tevez & Javier Mascherano
In 2006, post the World Cup, West Ham thought they had hit a jackpot when they signed two Argentine stars for nothing. The shock transfer, however, ended up costing them a fortune.
The quality of the players was never in doubt, except who owned them? The Hammers board were flummoxed by Kia Joorabchian, the brain behind the controversial double transfer from Corinthians, into believing that they had done the deal of the decade.
On the contrary, it emerged that West Ham had entered into a third party ownership agreement, which cost them 15 million pounds in compensation.
Edited by Staff Editor