The France international leads the charts after finalising an €80 million (£68m/$90m) move, but who else ranks near the top?
Getty25. LUCAS ALARIOTransfer fee: €24 million (£20m/$27m) | from River Plate to Bayer Leverkusen | Season 2017/18AdvertisementGetty Images22. ARJEN ROBBEN
Transfer fee: €25 million (£21m/$28m) | from Real Madrid to Bayern Munich | Season 2009/10
Getty22. THIAGO ALCANTARATransfer fee: €25 million (£21m/$28m) | from Barcelona to Bayern Munich | Season 2013/14Getty Images22. ANDRIY YARMOLENKO
Transfer fee: €25 million (£21m/$28m) | from Dynamo Kiev to Borussia Dortmund | Season 2017/18