Western Australia 175 and 4 for 91 trail Victoria 375 (McDonald 101, Siddle 87, Johnson 3-73, Hogan 3-73, Coulter-Nile 3-92) by 109 runs
Andrew McDonald and Peter Siddle dominated Western Australia with bat and ball as Victoria pushed close to an outright victory in the Sheffield Shield match at the WACA ground.
Resuming at 3 for 144, the Bushrangers were hurtled forward by McDonald's century arriving in a mere 87 balls.
While he was dismissed the ball after reaching three figures, Siddle would go on to his highest first-class score, adding a pesky 70 for the last wicket with the left-arm spinner John Holland.
Having been kept out in the field for far more overs and runs than they would have liked when the visitors were 8 for 264, the Warriors then replied limply to a deficit of 200.
Marcus Harris was LBW to John Hastings, before Liam Davis and Marcus North perished in successive deliveries from Siddle.
Adam Voges survived the hat-trick ball but then edged McDonald behind to leave the hosts a forlorn 4 for 39. The brothers Shaun and Mitchell Marsh survived to stumps, but have been left with an enormous task to pull WA back into the match on day three.