Sam Murray will fight his AFL anti-doping ban in the hope his suspension can be reduced from the maximum of four years to just two.

Murray returned a positive match-day cocaine sample after Collingwood's round 19 clash with Richmond last year.

The maximum ban for for a match-day positive result is four years, which could end the 21-year-old's career.

A two-year suspension - which Murray's lawyers will be fighting for - would see him become available towards the end of the 2020 season, and would even allow Murray to train with the club in the finals months of his ban.

A hearing is set to be held in late June or early July.

However, reducing the ban is more easier said than done according to former ASADA boss Richard Ings, who told the Herald Sun it's "exceedingly rare" to have a match-day positive reduced.

“Generally speaking its exceedingly rare for an athlete subject to a match day positive for cocaine to get a reduced sanction,“ he said.