Lions change spots for Perth in hunt for best starting line-up Mane man: Stewart Hogg pushes the team mascot through Perth airport after landing on Monday. Ireland centre Brian O'Driscoll has urged the British and Irish Lions to foster a "ruthlessness" in their preparation and performance in the build up to the first Test against the Wallabies. O'Driscoll, a veteran of four Lions tours, will captain the side against the Force on Wednesday in the first outing of their nine-game, three-Test tour of Australia. He will start outside England centre Manu Tuilagi in a wholly different team to the one that trounced the Barbarians in Hong Kong on Saturday. Lions coach Warren Gatland appears to be giving all squad members time to stake their claim ahead of the first Test in Brisbane on June 22, naming Ireland's Jonathan Sexton in place of Owen Farrell at five-eighth and Conor Murray at halfback ahead of Wales' Mike Phillips. Tour captain Sam Warburton will sit out another game with a "puffy" knee but may be in contention for the Reds game on Saturday. The side contains eight Lions debutants, with Gatland taking a get-to-know-you approach to the talent and combinations in his squad. But within hours of touching down in Perth on Monday, O'Driscoll was pushing for a hard-headed approach, warning his teammates of the dangers of "stuttering and starting" in the first tour games. "We were pleased with how we started [in Hong Kong] but we've got to continue building, working hard at training, and when we get to games try to build a bit of a ruthlessness about our mentality and performance," he said. You tend not to be able to tip away then get to the Test series and then be phenomenal, that's a rarity. You've got to really work towards building your game plan, building your defensive systems, building your kicking game, all the different dimensions of your game, so that when you do get to a Test they are at a very high level and you're able to kick it on to the next level. It's very difficult if you're stuttering and starting in the first five games. The Force will be the better prepared side going into the match on Wednesday. While coach Michael Foley has spent considerable time analysing the strengths and threats in the Lions squad, Gatland on Monday made it clear he was taking an insular approach. "We're not looking too much at the Australian sides at the moment, we'll start to do that a little bit later, but [now] it's just about reviewing our own performances and previewing those," he said. We're still getting to know calls and patterns and structures and building on combinations as well. As Saturday was, this game on Wednesday is just about us. We've had a little bit of a look at the Force and how they've been playing, we've got a game plan to go out and attack them with, but we won't be looking at them in too much detail. Gatland voiced concerns over Ireland fullback Rob Kearney, who has a grade one tear in his hamstring and may be sent home. Leigh Halfpenny, Stuart Hogg and Sean Maitland provide cover at fullback, but Gatland did not rule out sending for a replacement if Kearney's recovery stalled. Lions: Leigh Halfpenny, Tommy Bowe, Brian O'Driscoll, Manu Tuilagi, George North, Jonathan Sexton, Conor Murray, Jamie Heaslip, Sean O'Brien, Tom Croft, Ian Evans, Alun Wyn Jones, Dan Cole, Rory Best, Cian Healy. Res: Tom Youngs, Mako Vunipola, Matt Stevens, Geoff Parling, Toby Faletau, Ben Youngs, Owen Farrell, Sean Maitland.