The Tasmanian Tigers' desperate chase for a bonus point in their opening game of the Marsh Cup has led to a remarkable one-run defeat in Perth.

After a star all-round showing with the ball saw all bowlers take multiple wickets, with debutant Nathan Ellis starring with 3/35, the Tigers' target for victory was an under-par 185.

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The chase began smoothly enough, with opener Ben McDermott (78) picking up where he left off from last summer's One-Day tournament as its Best Player and anchoring our chase.

With semi-finals removed and just the top two making this year's tournament only final, there's an added incentive to pick up bonus points and with six wickets in hand and a little over a run-a-ball required to achieve the target in 40 overs, the Tigers began to up the ante.

But when Beau Webster was caught in the deep and James Faulkner soon followed, it was Ben McDermott and the bowlers remaining.

McDermott charged a short ball in an attempt to get it over a cover fielder in the ring and was caught, before Gurinder Sandhu very nearly cracked the four runs required through the same just a few balls later.

He too was caught chasing the extra point leaving three runs to get with two wickets remaining. Jackson Bird was adjudged caught behind before debutant Ellis copped an LBW decision which looked a little high on replay to seal the Tigers' fate.

The Tigers opportunity to respond from this result comes tomorrow at the same venue against Western Australia from midday. Live scores and live stream will be on