Manchester United are at loggerheads with Manchester City as hundreds of away fans look set to being locked out of next month’s derby.
United are disgruntled at their rivals for failing to offer the full allocation of 3,000 at one end of the Etihad Stadium on April 7.
The allocation is 200 less than what most away teams get.
According to Sportsmail, Manchester United officials have complained in writing to City to express displeasure as the row escalates.
However, it is gathered that City claimed that they have been advised to limit the away end to 2,800 – just as their safety advisory group recommended for the Champions League tie against Feyenoord in November.
The Premier League are aware of the issue and could yet become involved, although there is an acceptance that United’s allocation is unlikely to change.
United – whose numbers have previously been cut because of persistent standing – say behaviour has improved significantly in recent years. City have until later on Saturday afternoon confirm the allocation.
Pep Guardiola could clinch his first league title that day and the problem between the two clubs comes after United denied a City film crew access to the Old Trafford tunnel earlier in the season.