11 – Felipe Santana
One of the more lesser known names on this list, but still a traitor all the same, Brazilian defender Felipe Santana angered a fair few Dortmund fans when he signed for rivals Schalke from the German giants in 2013. Although he helped the club reach the Champions League final in 2013, Sanatan is still seen negatively by Dortmund fans for his actions all those years ago.
10 – Luis Enrique
With stars such as Michael Laudrup and Luis Figo swapping Barcelona for Real during their careers, it was time for the Blaugrana to get their own back in 1996, after the Catalan giants signed Luis Enrique from Real.
Enrique then became manager of the club back in 2014, something that would’ve surely seen Real fans hate the Spaniard even more!
9 – Luis Figo
Onto one of the more famous names on this list, Figo sparked huge outrage in 200 when he swapped the Camp Nou for the Santiago Bernabeu. The player was absolutely hammered by Barca fans on his first game back at the Camp Nou, with one supporter even famously throwing a pig’s head at the Portuguese winger. How’s that for hatred!