South Australia's James Smith and Michael Klinger both fell just before tea on day two as the Redbacks moved to 3-179 in the Sheffield Shield match against Western Australia at the WACA Ground.
Smith and Klinger were at the crease when the day started with the Redbacks on 1-19 in reply to the Warriors' first-innings total of 284 after South Australian skipper Daniel Harris won the toss and elected to bowl.
Smith and Klinger batted right through the opening session and most of the second before falling in the 70s before tea.
Klinger was the first to be dismissed for 74 to end the 151-run partnership and then Smith joined him back in the pavilion for 78.
At tea, Cameron Borgas remains 13 not out and Tom Cooper is two with the Redbacks 105 runs behind WA's first-innings total with seven wickets in hand.
South Australia suffered a setback in just the second over of the innings as it tried to survive the 45 minutes to stumps on day one when stand-in captain Harris was clean bowled without scoring from a superb ball from Michael Hogan, but Klinger and Smith found it easier, albeit slow going.
Smith, 21, hit 10 boundaries as he faced 227 balls for his 78.
Klinger continued his superb form that had already seen him score two Shield centuries this season hitting 12 boundaries for his 74, but he also found it a little slow facing 189 deliveries.
Klinger was out when he tried to play a cut shot off Brad Knowles that was too close to him and he played it on, while Smith miscued a pull shot and hit it straight to Hogan at mid-on off Knowles as well.
WA's quick bowlers Hogan, Steve Magoffin, Ashley Noffke and Knowles have toiled hard for little reward in the 30-plus degree conditions.
Knowles now has 2-41 and Hogan 1-49 to be the only wicket-takers.
Harris' decision to send the Warriors in to bat on the first day is increasingly looking like being a good move.
WA batsmen Voges (54), Liam Davis (44), Magoffin (42), Luke Ronchi (41), Wes Robinson (36) and Marcus North (29) all made solid starts, but couldn't go on with it keeping the score to what could be a below-par total.
The Redbacks' bowlers worked hard with Dan Christian leading the way taking 4-63.
Jake Haberfield also bowled well for 3-64 and debutant left-armer Gary Putland chipped in with 2-68.
Western Australia 1st innings 284
South Australia 1st innings
Smith c Hogan b Knowles 78
Harris b Hogan 0
Klinger b Knowles 74
Borgas not out 13
Cooper not out 2
Extras: 12 (2lb, 5nb, 5w)
Total: 179 (3 wickets; 72 overs)
FoW: 1-6, 2-157, 3-176
Bowling:
Magoffin 17 - 6 - 46 - 0 (5w)
Hogan 18 - 7 - 49 - 1
Noffke 17 - 6 - 24 - 0 (1nb)
Knowles 12 - 1 - 41 - 2 (4nb)
North 8 - 1 - 17 - 0