Tasmanian pacemen Gerard Denton and Damien Wright snared two wickets each in the final session to put a major dent in South Australia's chances of hauling in a huge victory target in their Pura Cup match at Adelaide Oval.

At stumps on day three, SA was 4-110 in its second innings, chasing 430 to win, with all-rounder Mick Miller on five and skipper Darren Lehmann on 10.

The Tigers made 334 in their second innings, after leading by 95 on the first innings.

Wicketkeeper Sean Clingeleffer top-scored with 72 in a series of handy partnerships with the tailenders that pushed SA's chances of winning the match out from unlikely to virtually impossible.

Wright and Denton then increased the Tigers' chances of an outright win further when they each took an early SA second innings wicket to have the Redbacks at 2-15 in the 10th over, with Denton's yorking of Greg Blewett, for one, a major blow.

Young SA batsman Mark Cosgrove provided a counterpunch with a hard-hitting innings of 54 from 68 balls, which included nine boundaries, most of the damage coming off left-arm spinners Xavier Doherty and Shannon Tubb.

He shared a 76-run stand with opener David Fitzgerald (26), before Denton returned to have Fitzgerald caught at slip late in the session.

In the following over, Wright had Cosgrove caught behind flashing at a wide ball outside offstump.

The situation could have been even more desperate for SA, with Jamie Cox putting down an extremely sharp chance off Lehmann at short leg just before stumps, from Wright's bowling.

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