Heat sizzle past Sixers in WBBL

Sisters Laura (l) and Grace Harris have guided WBBL champions Brisbane home over Sydney Sixers

Brisbane Heat have leapt to second position on the WBBL ladder after thumping Sydney Sixers by seven wickets in Saturday's blockbuster at North Sydney Oval.

In a rematch of last season's final, the reigning champions were untroubled in cruising past the Sixers' modest 7-123 with 19 balls to spare, leapfrogging them and Adelaide Strikers in the standings in the process.

With her sister Grace Harris (26 not out) at the other end at the end, Laura Harris raised the Heat's fourth successive win over the Sixers by smashing Hayley Silver-Holmes over the long-on fence for her second six.

Openers Beth Mooney and Maddy Green contributed 25 apiece and No.3 Jess Jonassen top-scored with 33 to cap a fine all-round game before the Harris sisters finished with a bang to make light work of the chase.

Leg-spinner Dane van Niekerk (2-19) was the pick of the bowlers after earlier top-scoring with the bat for the Sixers who started horribly, recovered in the middle and stalled late.

Six days after combining for a record-smashing, unbroken 199-run opening stand, Alyssa Healy and Ellyse Perry both departed cheaply to put the Sixers on the back foot.

Healy was skittled for five by a peach from Sammy-Jo Johnson before Perry, averaging 139.50 in this WBBL campaign entering the match, was trapped plumb in front for two by Delissa Kimmince.

Van Niekerk (28), Marizanne Kapp (26), Ash Gardner (24) and Erin Burns (23) chipped in with cameos but no Sydney batter was able to convert their start or free their arms against some impressive Heat bowling.

Player-of-the-match Jonassen (2-20) and Kimmince (2-26) were the chief destroyers while Johnson (1-11) was miserly with the new rock.