Delray Rawlins produced career best Twenty20 figures to help Sussex keep their quarter-final hopes alive in the Vitality Blast yesterday.The Bermuda all-rounder took three for 21 with his left- arm spin in Sussex’s three-wicket win over Middlesex in their final South Group match on home turf at The 1st Central County Ground in Hove.Rawlins claimed the scalps of Joseph Cracknell and James Harris in the space of three deliveries in his second over before removing Martin Andersson with the final ball of his third to complete an impressive treble.New ball bowler George Garton took four for 27 to lead the Sussex attack as the visitors were restricted to 155 for eight after being sent to bat.Middlesex were reeling at 81 for five in the 12th over before John Simpson (46) and Luke Hollman (35) added 64 in 39 balls to stop the rot.It wasn’t enough, however, as Sussex replied with 158 for seven after overcoming a collapse.The home side were coasting at 70 without loss but were pegged back after losing six wickets in the space of 51 runs and ten overs.It took a blistering knock of 24 from just nine deliveries from Garton to get the run chase back on track.The lower order bat smashed three sixes and a boundary to dominate a timely 32 run seventh-wicket partnership with Aaron Thomason.Garton was dismissed on the final ball of the penultimate over, leaving Thomason to hit the winning boundary off Tom Helm to carry Sussex across the line with four balls to spare.Opener Phil Salt led the chase for Sussex, belting eight boundaries in an innings of 56 from 40 deliveries at the top of the order.Teenaged leg spinner Hollman was the pick of the Middlesex bowling with three for 18 respectively.Sussex can clinch the remaining automatic quarter-final spot up for grabs in their group with victory over champions Essex in their final group game at Chelmsford tomorrow.Group winners Surrey clinched the first automatic spot in the quarter-final after beating Sussex by four-wickets at The Kia Oval on Wednesday.