Anthony Joshua and Tyson Fury’s long-awaited showdown could be on the brink of collapse unless serious progress is made within the next 10 days.Both parties have agreed to meet each other in November; however, a disagreement over the location for the fight has stalled negotiations.Negotiations have stalled on Anthony Joshua’s sideGettySaudi boxing chief Turki Alalshikh and streaming service Netflix, which has acquired the rights to the bout, are pushing for the Battle of Britain to be staged at New York’s Madison Square Garden.Joshua, on the other hand, has it written into his contract that the contest is to take place in the United Kingdom.AJ’s promoter Eddie Hearn sent an addendum to Alalshikh last week laying out all the terms that must be fulfilled for his client to head stateside.Among those requests is an increase to Joshua’s purse to compensate for the higher tax burden of fighting across the pond.Hearn has also asked for Joshua’s full purse to be paid for his last outing against Kristian Prenga on July 25.The Matchroom Boxing mogul revealed on Wednesday that he is still awaiting a response from Alalshikh.Anthony Joshua set strict deadline Amidst all of the uncertainty surrounding the fight, Fury and his team are growing frustrated, with ‘The Gypsy King’s’ long-time promoter Frank Warren declaring that there is a cut-off date for negotiations.Speaking to the Daily Mail, he said: “Unless AJ commits by the end of next week, I’m afraid this will slip away like so many of those great fights which never happened.”Hearn also recently admitted that “this week is probably the deadline” for the bout to take place on the proposed November 20 date.Tyson Fury has a ‘backup opponent lined up’Fury has already started his camp in Miami and is fully intent on boxing at the back end of the year, whether that is against Joshua or not.Frank Warren claims the fight must be signed by the end of next week if it is to happenGettyAccording to his brother Shane, the two-time heavyweight world champion already has a replacement opponent lined up.While he stopped short of naming names, a fight between Fury and newly crowned WBC champion Agit Kabayel could end up being made if the Joshua fight falls by the wayside.Fury is ranked No.1 by the WBC and has previously opened the door to a fight with the heavy-handed German.“If (Usyk) pulls out of the fight with Kabayel, then I’m in with Kabayel,” Fury told iFL TV in June. “If the Joshua fight doesn’t happen for whatever reason, then I’ll get my shot at (becoming) three times (world champion) against Kabayel, and I’ll take it to Wembley. “Kabayel’s a big, destroying man, whom I’ve known from being a young lad. “And helped promote him, manage him, look after him, everything. That’d be great.”Watch Boxing on DAZN*If you click a link in this boxout, we will earn affiliate revenueSign up to DAZN to access the definitive subscription for boxing fans.Upgrade to DAZN Ultimate from just £24.99/month, guaranteeing access to 185+ fights annually, a minimum of 12 pay-per-views at no extra cost, as well as every Lega Serie A match and other elite football access.Alternatively, DAZN Standard is just £15.99/month, with the caveat you will have to pay for pay-per-view events.Click here to sign up.