Players and staff from the two clubs became embroiled in a brawl after City's 2-1 win at Old Trafford
Lukaku was cited for a misdemeanour on eve of move to United in July
Chant references size of striker's manhood and many believe it amounts to racial stereotyping
The chant makes reference to the striker being well-endowed, and has faced calls to be banned by the club
Simon Woolley of Operation Black Vote says 'racism has no place in British football grounds'
Here are some of the best jokes we've seen this morning
Irish Herald makes unfortunate photo error as Lukaku prepares for move to Old Trafford.