U.S. star Jozy Altidore was subjected to racial abuse during AZ Alkmaar's cup win at Den Bosch in the Netherlands. The match was halted and the crowd were asked to stop the abusive chanting before the action resumed.
AC Milan's Kevin Prince-Boateng walked off the pitch after being racially abused during his side's friendly game with Pro Patria earlier this month. The midfielder was praised for his actions by FIFA president Sepp Blatter.
Serbia was ordered to play one under-21 match behind closed doors and was fined $105,000 by European football's governing body UEFA for racial abuse in a match with England. UEFA president has appealed the verdict of his organization in the hope of seeing stiffer punishments administered.
Chelsea and England captain John Terry was charged by UK police after allegedly making racist remarks to Queens Park Rangers defender Anton Ferdinand in October 2011. Terry was cleared of the charges in a London court in July 2012.
Liverpool's Luis Suarez was banned and fined by the English Football Association after Manchester United's Patrice Evra claimed the Uruguayan racially insulted him during a match, also in October 2011. Suarez flatly denies Evra's claims.
Brazilian World Cup winner Roberto Carlos walked off the pitch while playing for Russian team Anzhi Makhachkala against Krylya Sovetov in June the same year, after having a banana thrown towards him in the closing stages of the match.