The transfer window can be a hectic place. Teams are throwing money around left and right as now billions of dollars exchanges hands across Europe. How have the most expensive deals worked out, though? Here's a look back at the biggest cash outlay from each of the past 25 summer transfer windows, and whether or not the team ponying up the cash got what they paid for.
Note: All fees and stats via transfermarkt.com.
1
Gianluca Vialli — 1992/93
From: Sampdoria
To: Juventus
Fee: €16.