MELBOURNE’S Clayton Oliver left the training track early on Wednesday due to further hamstring discomfort that he experienced during his pre-training testing.

The Demons’ GM of AFL Performance Alan Richardson provided an update on the midfielder.

“Clayton has a complex hamstring injury, due to the fact that the injury is located where the muscle attaches to the tendon, and to further complicate that, there is injury to two separate hamstring muscles,” Richardson said.

“There is no doubt that Clayton’s recovery has been complicated by the week he was required to spend immobile in hospital.

“What we have experienced so far is that Clayton can comfortably achieve 90 percent of his running capacity, but as we saw yesterday, he is unable to get to full speed to pass his minimum training markers. 

“This suggests that, due to the discomfort Clayton felt during his run throughs, further recovery time is required. At this stage, we expect this will be three to four weeks.

“The club will continue to explore all treatment options for Clayton, but as with all players, we won’t be taking any risks with his return to play timelines.”