But what are the highest fees paid out by the Elland Road club to date? From Rio Ferdinand to Seth Johnson... we take a look at the most expensive business the Whites have done so far throughout their history below.
2. Helder Costa
Paid in instalments to Wolverhampton Wanderers - but it's 15m in total for the winger.
3. Robbie Keane
Arrived from Inter Milan in a deal worth 12m as his loan was made permanent...
5. Patrick Bamford
Captured from Middlesbrough - Bamford arrived for an initial fee of 7m which rises to 10m dependant on bonuses.
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