It's time for injury-stretched Wales to finally deliver against old foe Australia Yes, under Gatland Wales have won two Six Nations Grand Slams and a championship, as well as only narrowly losing a Rugby World Cup semi-final. Indeed, this season they could become the first side to capture three consecutive outright championships in the Six Nations" various guises. Go all the way back to 1883 and no one has done it. Last summer when the pressure mounted for the final Test of the British and Irish Lions tour of Australia, Gatland turned to those he knew best. He finally picked his team rather than one that might have been influenced by the input of others. He turned to 10 Welshmen, and they delivered. But that victory has only increased the expectation, even if three of those 10 - Jamie Roberts, Jonathan Davies and Adam Jones - have already fallen to injury. It still leaves Leigh Halfpenny, George North, Mike Phillips, Richard Hibbard, Alun Wyn Jones, Dan Lydiate and Toby Faletau from that Lions victory in Sydney, plus, of course, tour captain Sam Warburton, who missed that final Test through injury. Add Gethin Jenkins, Wales's latest centurion and a genuine world-class performer, and it is clear that this is a side of genuine quality. What is the problem then? Well, those absentees are killer casualties, top-notch influential players gone missing. It has almost become cliche now, but Wales lack depth horribly. The dire 17-7 Friday night victory over Tonga, with not a point scored in the second half, was evidence of that to a certain extent. But probably only Halfpenny, North, Ashley Beck or Owen Williams, Ian Evans and Lydiate of that starting side against Tonga might line up on Saturday. There were no reported injuries, always a bonus against a team of hard-tackling South Sea Islanders. Owen Williams and Beck were battling for one centre spot as long as Scott Williams, a revelation against Argentina a fortnight ago, can recover from a toe injury. Owen Williams is the more dangerous attacker, but Beck's greater knowledge of Wales" defensive systems might crack the nod for him. Adam Jones appears irreplaceable at tight-head prop, but Scott Andrews may be fit after injuring his neck against South Africa. If not the rookie Rhodri Jones, who started against Tonga, will play. With Bradley Davies injured and Charteris unavailable, Evans should start ahead of Andrew Coombs, who himself has a back problem. At fly-half an interesting choice awaits between Rhys Priestland and Dan Biggar, with Priestland very much Gatland's man but with Biggar very impressive against Argentina. There is also the problem of a mental block. Warburton has admitted that there is a "psychological" barrier. But it is not necessarily a collective malaise. It only takes one or two individuals to lack conviction in the crucial moments, and the game can be lost. Gatland has said he is "very confident" of victory. Just like his Welsh Lions in that final Test did not, his Wales players now must not let him down.