Racism has reared its ugly head in the world of professional football once again, from the Suarez-Evra incident and the ongoing legal case which has seen John Terry lose the England captaincy after allegedly using racist language towards QPR's Anton Ferdinand, to the abuse received by Manchester City players on their visit to Porto last week. But are racist incidents unusual in the modern game? Or is there still a nasty prejudice blighting the nation's favourite sport, today as much as ever?