South Australian batsman Michael Klinger posted a half-century against Queensland as the Sheffield Shield match in Adelaide headed for a draw on Saturday.

The Redbacks were 2-103 in their second innings at tea on the final day, a lead of 25 runs over the Bulls.

Queensland legspinner Cameron Boyce has both wickets to fall, dismissing Klinger for 51 and his opening partner Sam Raphael for 40.

The Bulls’ bowling attack has been weakened by the absence of Test spearhead Ryan Harris, who is suffering from a virus.

Harris is the sixth Bulls player to suffer a stomach illness during the match at Glenelg Oval.

Earlier Saturday, Harris batted and made 22 as Queensland reached 465 all out.

But with Harris to play a key role in Australia’s five-Test series against England starting on November 21, the paceman was not being risked to bowl.

The Bulls banked a first-innings lead of 78 runs as SA captain Johan Botha claimed 5-114 from 51 overs in his first long-form match since being cleared of having an illegal bowling action.

The Redbacks’ skipper was cited by umpires in a recent one-dayer but was cleared by biomechanical testing overseen by Cricket Australia.