Brock-Burrum's minor premiership hopes will rest on toppling Osborne away in Saturday's blockbuster.
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The pair is involved in a battle for top spot against Walla with just the two rounds left.
Walla leads second-placed Osborne by half a win, with another three points back to Brock.
"It's definitely important, the higher you finish the better and if you can get top spot, you would definitely get the double chance, no matter what," Brock opening batsman Dave Williams said.
"Realistically, anyone in the top six teams can beat anyone, so it's not really about trying to play somebody lower on the ladder because they can upset you just as quickly."
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Anyone in the top six teams can beat anyone, so it's not really about trying to play somebody lower on the ladder because they can upset you.
- Dave Williams
Interestingly, Osborne's Ed Perryman is his club's leading run-scorer (232 at 46) and wicket-taker (20 at 13), while Brock's Trent I'Anson is the same (208 at 35 and 12 at 15).
Elsewhere, Walbundrie hosts Walla, The Rock-Yerong Creek faces Lockhart, Rand is home to Henty, while Holbrook hosts Culcairn.