Star West Coast ruckman Nic Naitanui has had more surgery to his reconstructed knee.

He had exploratory arthroscopic surgery after suffering soreness on the back of an extensive training escalation in a bid to possibly make an earlier than expected playing return during the Eagles' finals campaign in 2017.

Nic Naitanui suffered some minor damage to his knee while pushing for an Eagles recall. Credit:7 News

There was slight cartilage damage that needed trimming and cleaning up from surgeons.

A major revelation from the exploration, though, is that the 2012 All-Australian had bone damage in the head of his femur bone on the outside of his left knee.