IT clearly looked worse than it was.
The latest police notice about the violence at the derby game on Sunday 8 December - City lost 2-3 to United - emphasises the relatively few arrests that were made.
The following people were charged:
Andrew Martin (born 17/03/1992) of Northdale Drive, Blackley was charged with being drunk and disorderly.
Peter Harrison, born 31/1/82, of Springfield Rd, Kearsley was charged with racially aggravated public order.
Matthew Stott, born 21/10/91, of Southfields, Knutsford and Christopher Johnson, born 30/4/60 of Ancoats Lane, Alderley Edge were charged with pitch encroachment.
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Warren Singh, born 12/12/93, of Oakdale Drive, Heald Green was charged with section 5 public order.
Sam Weatherby, born 14/8/91, of Grant St, Farnworth, Bolton and Philip O'Leary, born 8/10/88 of Heysbank Rd, Disley, Stockport were charged with breach of a football banning order.
Christopher O'Neil, born 17/1/91, of Swainsthorpe Drive, Manchester, Andrew Martin (born 17/03/1992) of Northdale Drive, Blackley, and Nicholas Morley, born 13/4/91, of Chapel Lane, Blackley, were charged with being drunk and disorderly.
All are due before Manchester City Magistrates' Court on 4 January 2013.
Four other arrests were made.
A 50-year-old man arrested for ticket touting was released without charge, a 45-year-old man was summonsed for a racially aggravated public order offence, an 18-year-old woman was cautioned for being drunk and disorderly and a 33-year-old man remains in police custody after being arrested on suspicion of possessing a class A drug.
Police are continuing to work with MCFC to identify the offender who threw the coin at Rio Ferdinand.
Chief Inspector Steve Howard said: "To have just 13 arrests for a crowd of this size and a match of this proportion is a testament to the policing operation we put in place.
"Despite fierce rivalry and high tension there was no major disorder. However, we will continue to investigate the coin throwing incident and are determined to work with the club to bring the perpetrator to justice."