Sydney Sixers 140 for 7 (Carmichael 32*, Graham 3-18, A Smith 3-20) beat Hobart Hurricanes 139 for 7 (Lee 50, Graham 36) by three wickets

A late cameo from Mathilda Carmichael guided the Sydney Sixers to a final-ball WBBL win over Hobart Hurricanes, keeping their slim final chances alive.

Carmichael top-scored with an unbeaten 32 from 21 balls batting at No. 7 at Blundstone Arena on Monday night as Sixers reached their target of 140 with three wickets remaining.

Sixers needed 30 from the final three overs when Carmichael, a former Hockeyroos player, came to life with back-to-back boundaries off Shabnim Ismail.

Needing 10 runs from the last over, Carmichael hit a crucial four off the first ball before some quick running saw the match tied with one ball remaining.

Kate Peterson held her nerve against the spin of Molly Strano to ice the game with a single off the last delivery.

The win was Sixers' fourth in a row and pushes them to within two points of the fourth-placed Brisbane Heat with four games remaining. Heat still have five games up their sleeve.

Hurricanes appeared to have the upper hand when teenager legspinner Amy Smith and medium pacer Heather Graham put the squeeze on in the middle-to-late overs.

Smith picked up career-best figures of 3 for 20 which included the big scalp of Ash Gardner in the 13th over.Graham took 3 for 18 including two wickets in the 16th over which left Sixers reeling at 107 for 7.

Hurricanes earlier posted 139 for 8 on the back of a 34-ball 50 from opener Lizelle Lee.She struck seven fours and one six and brought up her half-century with a boundary through cover but was caught in the deep off the next ball.

Lee was supported by Graham, who hit 36 from 28 but Hurricanes' fell away towards the back-end of their innings.

They remain in sixth position on the ladder with three wins from nine starts.