At least 19 people will appear in court after trouble flared at a book signing by the English Defence League founder.
Violence broke out before the Sunderland-Celtic match at an event in an off-licence attended by Tommy Robinson.
Northumbria Police made several arrests at Fletcher’s News and Booze in Hendon, Sunderland, and in other parts of the city, for being drunk and disorderly.
One man was taken to hospital with a head injury.
Police had been called to the off-licence at about 13:40 BST.
The force said the far-right activist was wearing a shirt belonging to Celtic’s Glasgow rivals, Rangers.
Footage posted on social media showed a flare and other objects being thrown towards the shop before fighting broke out on the street.
In a tweet on Saturday, officers denied social media rumours of a fatality and “disorder” across the city.
The pre-season match was organised to mark 20 years since the opening of Sunderland’s Stadium of Light and 50 years since Celtic won the European Cup.
Assistant Chief Constable Helen McMillan said: “Unfortunately we did have some incidents of disorder in and around Sunderland between Sunderland and Celtic fans and while police dealt with them quickly, it is a shame these type of incidents happen at all.”
Sunderland were beaten by Celtic 0-5.