Transfers: How much would Chelsea's Diego Costa cost?

The transfer window is upon us and there are plenty of big-name players who are being linked with moves. But how much would they cost?

The CIES Football Observatory research team has developed a unique approach to estimate the transfer value of players. In June they revealed Neymar (€210.7 million) was the world's most expensive player.

So what would it cost to sign Diego Costa this summer? For his value, according to CIES, click here.