Ponting was forced to retire hurt after Australia lost Shane Watson for 89, the captain sent for x-rays after being struck just above the elbow with the second ball he faced, a 146kph screamer from Roach.

The skipper bravely tried to play through the pain, more than aware his retirement would force the under-pressure Hussey to face Roach, bowling with his tail up with the aid of a howling westerly behind him.

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Making 23 before his retirement, Ponting still had time to belt Roach for two boundaries and a six in the one over, while also being involved in a heated exchange with Dwayne Bravo that could see both players disciplined as umpire Ian Gould was forced to separate them.

But after seeking aid on two occasions from Australian physio Alex Kountouris, the captain was forced off, team officials hopeful Ponting has not cracked or broken the bone on the same arm where he has previously suffered wrist problems.

A serious arm injury would more than likely prevent the captain from batting again in Perth and would almost certainly rule him out of the first Test against Pakistan in Melbourne next week, elevating Michael Clarke to the captaincy role.

The drama surrounding the Ponting versus Roach battle almost overshadowed a somewhat encouraging second session performance by the West Indies after the tourists were belted to all corners of the park before lunch.

Australia went into the first break with their tail up, openers Watson and Katich scoring 106 without loss.

Having gone into this match in a confident frame of mind after the drawn second Test in Adelaide, a 69-run onslaught from Watson before lunch after he was dropped on seven by Chris Gayle, popped the bubble emphatically. However, from the first ball of the session, the tourists appeared to have lifted their rating.