West Indies captain Chris Gayle's helped his side build a healthy second-innings lead against Australia in the second Test at Adelaide.

West Indies captain Chris Gayle's helped his side build a healthy second-innings lead against Australia in the second Test at Adelaide.

The Windies made steady progress in the opening session on day four to be 95 for two at lunch, an overall lead of 107 runs.

After being praised for his tactics in the field yesterday, Gayle has played sensibly during his knock of 56 off 93 deliveries, scoring eight boundaries while showing a willingness to run the quick single too.

Shivnarine Chanderpaul (12) was the other not out batsman at the break, while Mitchell Johnson was the only successful bowler.

However, a cautious Peter Siddle managed to get through four overs at three-quarter pace due to his hamstring tightness.

Shane Watson has not bowled in this innings with former Test player and media commentator Damien Fleming suggesting on ABC radio the all-rounder may have a stomach problem.

Adrian Barath had an eventful eight overs in the morning session with the opener surviving an Australian referral decision for caught behind, smashing a cover drive boundary, then being run out for 17.

Bowler Nathan Hauritz got his fingertips to a Gayle straight drive and when the stumps were broken, a napping Barath was backing up at the non-striker's end and was well short of his crease.

The Australians used their last unsuccessful referral on a caught behind decision against Gayle but needed no replay system to send Ramnaresh Sarwan on his way.

Sarwan got a touch on a short delivery from Johnson and was caught by Brad Haddin down the leg side, ending a disappointing comeback for the number three batsman.