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#4 Hernan Crespo - £16.8m (2003-2008)
Undoubtedly one of the best strikers in the world during his heydey, Hernan Crespo was a goalscorer of the highest level, playing for some of the biggest clubs in the world, in addition to once being the most expensive player in history.
The former Argentine international arrived Chelsea in the summer of 2003 and spent the next five seasons mostly on loan (only spending two full seasons in the colours of Chelsea).
His standout performance came at AC Milan in the 2004/2005 season (when he scored a brace in the UCL final of their ultimately futile clash with Liverpool).
Throughout his five year contract with Chelsea, Crespo only spent the 2003/2004 and 2005/2006 season as a member of the Chelsea squad, making a total of 73 appearances in all competitions, scoring 25 goals, which is a far cry from the numbers he posted at other clubs.
