Sunderland AFC is being urged to reconsider allocating thousands of FA Cup tickets to Newcastle United fans.
The North East rivals are set to play each other in the third round of the FA Cup at the Stadium of Light on 6 January.
But Sunderland city councillor Dominic McDonough branded the decision to give 6,000 tickets to Newcastle fans a "bad move".
Sunderland said they had allocated fewer tickets than Newcastle could have claimed under FA Cup rules.
Mr McDonough said he believed the number of tickets given to Newcastle would lead to "increased tension between fans".