Reigning NBL champions New Zealand have cleared out at the top following a mid-season surge, but closest challengers Perth appear to be lacking self-belief.
The Breakers (10-3) made it five wins in a row with a 85-65 home conquest of Cairns (6-6), the team they vanquished in last year's grand final series.
Second-placed Perth (8-5) crashed to a 77-74 away loss to Gold Coast (5-5), surrendering a 21-point second-quarter lead.
"These boys just don't believe in themselves, you get a bit sick of it as a coach," Perth coach Rob Beveridge said.
"You're trying to pump them up and tell them how good they are, but they've got to have a little bit more self-belief."