Brisbane Heat 203 for 5 (Khawaja 94, Labuschagne 73, Green 2-29) beat Sydney Thunder 52 for 1 (Warner 36*, Bazley 1-3) by eight runs (DLS method)
Kicking off the finals series, Khawaja and Labuschagne combined for a 128-run partnership to power Heat to the highest ever total at the Sydney Showgrounds.
Play was set to restart with Thunder facing a revised target of 90 runs off nine overs - they were already 52 for 1 after 6.5 - but the match was ultimately called off due to persistent rain.
Heat prevailed and meet Melbourne Renegades in a knockout final at Marvel Stadium on Sunday, while Thunder's see-saw of a season ended in disappointment.
Khawaja and Labuschagne smash Thunder
Khawaja fell short of a deserved century but his fluency seemed to rub off on Labuschagne, who had struggled with his timing as he played anchor before unleashing some inventive strokes of his own to notch his first BBL half-century in his 23rd innings.
Labuschagne, who had averaged just 16 runs with a strike-rate of 104, hit his first six of the season when he clubbed seamer Daniel Sams over long-on in the final over. He repeated the dose three balls later to lift Heat past 200 before his 48-ball 73 ended on the penultimate delivery of the innings. Labuschagne proved a point to critics that his formidable longer format batting can translate into T20 cricket.
Pawson's horror debut
Nathan McAndrew's struggles in the powerplay led to Pawson coming into the attack in the third over and he was immediately lined up. His first ball was carved through point for a boundary by Khawaja, who then smashed two short deliveries to the rope. A rattled Pawson then dished up a waist-high full toss to cap a 15-run first over in the BBL. He hoped his fortune might change when he returned in the 11th over but it only stirred the ruthlessness in Khawaja, who hit two sixes.
Pawson, who had earned his call-up through solid form in local Sydney ranks, did show glimpses of rapid pace but just couldn't get his length right and finished a tough initiation with 0 for 32 off two overs.
Warner starts fast before rain spoils the party
Unlike his mate Steven Smith, Warner had struggled in his long-awaited BBL return and averaged just 12.6 in five innings. But here, he started aggressively and took a liking to left-armer Johnson by smashing three boundaries in the fourth over. It was the best Warner had looked during this BBL season and he threatened to play a heroic knock before rain intervened to end Thunder's season.