A Manchester United fans group have demanded cheaper season-ticket prices from next season.
They believe that the club have not invested appropriately in the playing squad and that this lack of outlay should be reflected in more affordable admission.
The chief executive of Manchester United Supporters Trust, Duncan Drasdo, told the Manchester Evening News: "We are throwing down a challenge to [joint chairman] Joel Glazer to cut United fans' season-ticket prices next season.
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"Given the lack of squad investment while huge revenues are coming in and the Glazers' constantly dipping into the club's bank account, it is long overdue that the loyal supporters received a cut in their ticket prices."
Drasdo believes that United's investment in the playing squad, much lower than many of their league rivals, does not tally with the amount of money that the club has spent in recent years.
"The Glazers have been responsible for more than £500 million flowing out of Manchester United in fees, charges and other payments relating to their hostile takeover of our club," he claimed.
"Meanwhile the club has actually spent less in net transfer fees than not only our main rivals in Europe and the Premier League [Manchester City, Chelsea, Liverpool, Tottenham] but also had a lower net spend since 2006 than Aston Villa, Sunderland and Stoke.
"It's worse than that, though - in the last three years United's net transfer spend has been less than Hull, Blackpool and Burnley.
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"Only the incredible efforts of Sir Alex Ferguson have allowed us to remain competitive in the Premier League," Drasdo continued.
"At times it feels like he is dragging the team towards a 20th league title by sheer willpower alone.
"However, even Sir Alex's magical touch couldn't bridge that gap in Europe.
"Despite his incredible feats it comes as a huge slap in the face for fans that for all the immense revenues flowing into the club there have been huge ticket price hikes for loyal fans since the Glazers' 2005 takeover."