Reds can now buy tickets for United's first pre-season friendly against AFC Fylde.
The match takes place on Friday July 17 at 19:45 and will showcase mostly reserve team players and members of the youth team.
AFC Fylde have now sold 600 tickets, including all £15 Main Stand ones.
About 1,200 tickets remain - all standing - priced £10. There are no concessionary prices.
Reds can call the ticket hotline during business hours on 01772 635880. Payment can be made by debit or credit card.