DOCUMENTS released by the Federal Court show the breakdown in the relationship between the Australian Sports Anti-Doping Authority and the AFL.
The documents, tendered as evidence in the trial involving Essendon, James Hird and ASADA, show the anti-doping watchdog at one point threatened to take the League to court.
A letter lawyer Craig Rawson from the Australian Government Solicitor, sent to AFL Legal Counsel Andrew Dillon on 21 August 2013, shows the two organisations were at loggerheads over who should have access to ASADA's interim report.
"ASADA believes that this is not consistent with the purpose identified in ASADA's letter of 2 August 2013 which provided the interim report to you," the letter reads.
"We are now instructed to require the following undertakings from the AFL by 6.30pm tonight, failing which we are instructed to apply to court without further notice to you to apply for relief in the terms of the undertakings sought."
The 'urgent correspondence' forms just part of hundreds of pages of documents made public, which form evidence in the trial.
Also made public are personal notes taken by former ASADA chief executive Aurora Andruska which detail multiple discussions with key government and AFL officials.
On Wednesday, Justice John Middleton reserved his decision after a three-day trial in Melbourne.
Essendon and James Hird are seeking to have ASADA's investigative work with the AFL declared unlawful and have show-cause notices issued to 34 past and present Bombers players thrown out.
