Two leading Liverpool FC supporter groups have announced plans to boycott their team's trip to the KC later this month because of the away ticket price of £48.
Spirit of Shankley say that the mark up in price compared to the same fixture last season and compared to other Premier League games at the KC this season is unfair.
Hull City are yet to comment on the protests.
Hull manager Steve Bruce believes people are unfairly "picking on" Mario Balotelli.
The Liverpool striker has come under-fire after he swapped shirts with Real Madrid's Pepe at half-time on Wednesday.
It was whilst his side trailed Real by three goals in the Champions League encounter and was substituted at the break.
Hull travel to Anfield in the Premier League today (3pm) and Bruce believes Balotelli is not playing as badly as some are suggesting.
Two people were injured following at attack on a bus carrying Hull City supporters through Liverpool after their team's two nil defeat at Anfield yesterday. Bricks and stones were thrown at the coach, causing thousands of pounds worth of damage. Sarah Clark reports.
Police are investigating after Hull City fans were injured after a supporters' coach was attacked in Liverpool yesterday.
Officers were called to Townsend Avenue, a mile from Anfield, after the game at around 5.35pm.
The coach was reportedly driving as its windows were smashed. A number of Hull City fans were on board at the time of the incident, who although shaken were largely uninjured. One man has reported suffering back pain as a result of the incident.
Officers are now examining CCTV and speaking with the coach company and witnesses from the area to trace those responsible.
Hillsborough camapigners have welcomed the announcement of a pre-inquest hearing into the deaths of the 96 victims.
The Judicial Office said it would be held in London on April 25 - probably with a live video link to Liverpool.
96 Liverpool fans died in the 1989 tragedy at Sheffield Wednesday's Hillsborough stadium.
The original inquest verdicts were quashed last year after a report revealed a cover-up. Lord Justice Goldring has been appointed coroner for the new hearings.