The Roos started strongly to have the hosts at 2-12, including the wicket of the competition’s best batsman Stewart Walters for a duck.
But Midland-Guildford regained control from that point on, thanks to an unbeaten 179 from opener Dominic Sibley, who combined with former WA batsman Tim Armstrong (50) for a 93-run third wicket stand.
In a difficult day for the visitors’ bowlers, Mathew Dzodzos had 2-61, while Chris Quelch and Jake Fawcett also took two wickets. Play resumes on Saturday with Wanneroo needing victory to stay in touch with the top six.
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