They say you get what you pay for, but you don't have to delve too far back in history to learn that a multi-million pound signing can achieve equal success to a player with half the price tag.

It's no coincidence that the most lucrative transfer fees come hand in hand with signing up the world's best, but money doesn't always buy success either, and some clubs who have splashed a fortune on their marquee signing have been left with little more than a damaged bank account.

Throwing around wads of cash is a risk and reward business in the football world – one superstar can singlehandedly revolutionise the fortunes of an entire club, or contribute little more than that skinny 17-year-old warming the bench.

Read on to see how we rate the impact of the five most expensive Premier League signings of all-time.

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