WALES are being tipped to finally beat Australia by Saracens star Marcelo Bosch whose Argentina side were crushed by Warren Gatland’s men on Saturday, writes Iwan Gabe Davies.

The Pumas centre was impressed by the hosts during their record 40-6 victory over the South Americans at the Millennium Stadium, bouncing back from their 24-15 setback against the Springboks earlier this month.

Wales face Tonga on Friday night before wrapping up 2013 with another crack at the Wallabies who have beaten them eight times in a row, stretching back to a 33-12 win four years ago.

Bosch, who won his 25th cap on the weekend, was impressed enough by Gatland’s side to back them to make history and claim their first scalp over a former Tri Nations side since beating Australia 21-18 in 2008.

His Argentina team came within an ace of winning their first Rugby Championship match in September when they were edged out 14-13 by the Aussies in Perth before being blown away 54-17 in the return game at home.

“Wales have a really good chance of beating Australia,” the 29-year-old former Biarritz man said.

“We should have won in Australia, but nothing went right for us at home to them.

“It’s going to be a really tough game, but I think Wales are capable of beating the Wallabies – if they play at their best. Nothing less will do.”

Bosch gave Wales a few pointers on how they can secure their 11th win over Australia, their opponents leading the series with 25 wins and just one game ending in a draw, 29-29 in 2006.

“Wales mustn’t make mistakes and need to have a good defence. Against Australia it’s so important to defend well near the rucks and mauls because their scrum-half Will Genia is very good at opening up space for his backs and forward.

“Defence is the key. Wales must try and be aggressive. As they did against us, they need to slow Australian ball down at the breakdown.

“If you allow Australia quick ball and to get into a rhythm, it’s difficult to beat them.”

Bosch urges them not to think too much about the recent British and Irish Lions’ 2-1 Test series triumph over the Wallabies when the squad was dominated by Welshmen.

“I’m sure the Welsh players know (how to beat the Wallabies) because of their success with the Lions.

“But it’s not the Lions playing, it’s Wales. You should not forget some of the key men for the Lions were from other countries.”

Australia are certainly hitting some ominous top form with crushing back-to-back victories on their European tour over Italy (50-20) and Ireland (32-15) after getting off to a 20-13 losing start to England at Twickenham.

And only a minor miracle will stop them beating a truly awful Scotland – trashed by South Africa 28-0 at Murrayfield on Sunday – when they play Scott Johnson’s men this weekend.