Scans have revealed West Coast midfielder Elliot Yeo has injured the medial ligament in his right knee and sustained syndesmosis damage to his right ankle.
Yeo was injured when he was tackled during match simulation at Mineral Resources Park during training on Friday.
“There are always risks involved as we increase the intensity at training to prepare for the season, and unfortunately Elliot has sustained injuries to his right knee and ankle,” General Manager Football Gavin Bell said.
“We are working through his rehab program and a return-to-play timeline.
“At this stage, we’re hopeful he will be available in the early part of the season.”