We have collected a list of football's ten most controversial transfers ever. These transfers are so controversial that they caused soccer fans to burn their season tickets, riot, and even injure one another.
Here's a sneak peak at the list of controversial transfers.
Luís Figo, FC Barcelona to Real Madrid (2000)
Sol Campbell, Tottenham Hotspur to Arsenal (2001)
Roberto Baggio, Fiorentina to Juventus (1990)
Carlos Tevez and Javier Mascherano, Corinthians to West Ham (2006)
John Obi Mikel, Lyn to Manchester United to Chelsea (2006)