Oz centre can't find fault in Drico

Australia centre Digby Ioane has conceded defeat in his attempts to uncover any weaknesses in Brian O'Driscoll's game.

Ioane has been given the task of containing Ireland's enduringly brilliant captain in his 100th Test appearance in tomorrow's clash at Croke Park.

The 24-year-old has been busy studying footage and has been forced to deliver a flawless verdict on his opposite number.

'I've been watching videos of Brian and can find no weaknesses in his game,' he said.

'He's probably the first guy I've watched play and there's nothing wrong - there are no missed tackles and he always gets over the line.

'And while he's old, he's still going - he's still a gun. He's so experienced.'

Ioane impressed against England last Saturday in only his second Test start at outside centre, forging a promising new-look midfield partnership with Quade Cooper.

But the Queensland Reds back knows crossing swords with O'Driscoll is a far greater challenge than anything he faced at Twickenham.

'It's the biggest test of my life. Everyone knows he's the best centre in the world,' he said.

'I'm nervous but at the same time excited. You don't get many opportunities like this to test yourself to see where you're at, so it will be awesome.

'I'm just following my older brother's advice. He always says never let your opposite number score against you.

'That's the worst thing that could happen, letting him get past me and scoring a try.'

The difference in experience between the two is vast with 92 caps separating them, while Ioane's position as a converted winger further stacks the odds in O'Driscoll's favour.

And should O'Driscoll's appearances for the Lions against South Africa this summer have found their way into his Ioane's viewing collection, he is sure to have endured some sleepless nights this week.

But while conceding Ioane trails in several departments, Wallaby coach Robbie Deans has great faith in the Test rookie

'It's not so much a head-on contest. They don't always defend each other or attack against each other,' said Deans.

'But obviously there will be parallels made. It's more about how the group thrives and Digby has made that transition well off the back of a full Super rugby season.'