The Stars defeated the Thunder by eight wickets at Sydney Showground Stadium on Saturday night extending their lead at the top of the WBBL|06 table to five points.
Captain Rachael Haynes with a composed 51 from 49 balls and Hannah Darlington's dismissal of Australian captain Meg Lanning (14) were highlights for the Thunder despite the loss.
South African Mignon du Preez (57 not out from 37) and England allrounder Nat Sciver (36 not out) expertly guided the Stars home. Melbourne made 2/135 in 16.5 overs after Thunder posted 5/131.
Thunder remain second on the table looking ahead to tomorrow morning's clash against the Perth Scorchers.
Haynes steered her side to 131 with her second half-century of WBBL|06.
Two stunning catches by Erin Osborne and Sciver gave the Stars the advantage with Thunder 3/61 in the 13th over.
In partnership with Phoebe Litchfield (29 not out from 24), Haynes steered the Thunder past 100.
A late flurry of stroke play from Rachel Trenaman (17 from 8), and some hard running between the wickets with Litchfield, got the Thunder to a competitive total.
Speedster Shabnim Ismail crashed into the stumps of Elyse Villani (20) to start the defence.
Australian and Melbourne Stars captain Meg Lanning was the massive wicket for the Thunder. Cue Alex Blackwell Medallist Hannah Darlington with possibly the ball of her career so far, hitting the base of Lanning's stumps dismissing her for 14.
PERFORMANCE OF THE MATCH
Coming to the crease at 2-17 after 3 overs, against a strong attack, Haynes led from the front as she always does and made 51 from 49 balls including six boundaries.
The Thunder now turn their focus towards the Perth Scorchers on Sunday morning back at Sydney Showground Stadium starting at 10.20am. Live on Seven, Fox Cricket and Kayo Sports.
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