Collingwood may have received a boost ahead of Mason Cox's tribunal hearing on Tuesday night, with a new twist revealing Tiger Dylan Grimes was in fact cleared of concussion following the head-high hit in Thursday night's game.

Cox heads to the tribunal on Tuesday night attempting to overturn the one match ban, with Collingwood likely to argue that it was an unintentional collision and that the impact wasn't enough to constitute a suspension.

Headed to the tribunal: Mason Cox. Credit:AAP

The latter may be helped by Grimes' medical, which states that club doctors actually cleared him of concussion following the incident.

Grimes spent 20 seconds on the ground following the run-in with the 211cm Cox late in the final quarter and then resumed playing shortly before being taken off.