West Coast player Willie Rioli is facing a possible four year ban after allegedly substituting urine samples being collected by ASADA.

Rioli has been provisionally suspended against playing in AFL and WAFL games. He will be permitted to still train with the team.

As a result he has been withdrawn from the West Coast Eagles team that will play against Geelong on Friday night.

Former ASADA Chief Richard Ings told Oliver Peterson that tampering with a urine sample is very serious but it’s easy to prove.

“We’ve seen positive drug tests in the AFL before but this is the first time we’ve seen an allegation of tampering.

“It’s never for a good reason when a person substitutes a urine sample.”

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