There have been some controversial transfers over the years, but here are 10 footballers who have dubbed the biggest 'traitors' in football for joining their rivals.
Click through the gallery to see 10 footballers who have been dubbed traitors, according to the Sun and Daily Mail.
Fans have been known to make their disappointment known when a player joins a rival, which former Netherlands star Robin van Perise experienced in 2012.
The Dutchman left Arsenal to join Premier League rivals Manchester United, who went on to lift the title however the striker was heavily booed at Old Trafford and on his return to the Emirates Stadium.
Luis Figo also makes the Sun's top list after his controversial move from FC Barcelona to Real Madrid for a then world record fee of €62 million.
The Portuguese was greeted by angry bunch of Barcelona supporters on his return to the Camp Nou as a pig head was launched onto the field when he took a corner.
Carlos Tevez also shocked football fans in 2009 when he left the Red Devils for cross-town rivals Manchester City 11 years, but you can click through the gallery to the full top 10.
Take part in our Lionel Messi Quiz and stand a chance to win 1 of 2 brand-new Huawei Y5p phones, worth R1899.