Holding "grave concerns" about their client, the legal team representing a 2012 Essendon player will ask the Supreme Court to order the AFL and the club to hand over documents about the club's 2012 supplements program.

Hal Hunter, an Essendon rookie list player from 2012 to '13, will be asking Justice Nemeer Mukhtar to order that the AFL and Essendon hand over "relevant" documents on Thursday before deciding how to advance their legal case, according to one of Hunter's lawyers.

Hal Hunter has not been not issued with a show-cause notice and his case is not connected to the WADA hearing. Credit:Ken Irwin

Patrick Keyzer, a professor of law at La Trobe University and Hunter's lawyer, said: "The AFL and Essendon have declined repeated requests to give us documents that are relevant to the health and safety of our client [Hunter]."

Keyzer said Hunter, now 22, "had the misfortune to be a rookie at Essendon during the notorious supplements scandal.