West Coast draftee Willie Rioli will undergo hamstring surgery on Tuesday despite appearing pain-free at training today.

The 21-year-old injured his right hamstring at training last week.

After consulting with medical staff this afternoon, it was decided he should undergo surgery immediately.

He is expected to miss 10-12 weeks.

Rioli jogged laps at training at Domain Stadium this morning and kicked a football using both feet.

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Rioli had been firming for an early season AFL debut as West Coast seek to rejig their forward line structure and had been originally earmarked to play in Saturday’s JLT Community series game against Greater Western Sydney in Narrandera.

But he hurt himself completing run throughs at training and was forced to sit out last Friday’s closed intraclub match at Domain Stadium.

Play Video The West Coast ruckman is still recovering after a devastating knee injury. The West Australian Video The West Coast ruckman is still recovering after a devastating knee injury.

Second-year forward Matthew Allen was also restricted to running laps this morning and now also appears likely to miss the pre-season hit-out against the Giants.

Allen is believed to have pulled up sore after taking to the field in last week’s intraclub game played in heavy rain.

Scott Lycett (knee) and Liam Duggan (hamstring) both joined in training with the main group as they continue their recovery from separate injuries.

Ruckman Jonathan Giles trained with a guard on his left hand. The 29-year-old is recovering from a thumb injury and will not travel east to play GWS, leaving Nathan Vardy and back-up Fraser McInnes to share ruck duties.