The Roos batted for the entirety of day one to amass 271 at Burrendah Reserve on Saturday.
English import Dan Lawrence returned to form with a team-high 59. Opener Aaron Brunner struck 50. The hosts’ Nic Geisler was best with the ball, taking 4-41.
Day two could prove challenging for Wanneroo, with the Dragons boasting talented WA opener Cameron Bancroft.
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