Terrific Tupou pushing stalwart Sio

The Rugby Championship

Even experienced prop Scott Sio can't help but marvel at front row teammate and super exciting young gun Taniela Tupou. Sio insists the competition for spots has never been stronger and can't wait to take on former scrum mentor Mario Ledesma.

The Wallabies face the Pumas at Robina Stadium on Saturday, kicking off at 8pm AEST, broadcast LIVE on FOX SPORTS, Channel Ten and RUGBY.com.au radio.