Wales defender Ashley Williams is eager to test himself against "some of the best players in the world" on Saturday.
England trainer Fabio Capello is tipped to pair Andy Carroll with Wayne Rooney in attack for the Euro 2012 qualifier in Cardiff's Millennium Stadium.
"It would be unbelievable... we don't need to speak anything about Wayne Rooney," said Williams.
"Everyone knows about him and it'll be a tough sport definitely - probably one of the toughest in my career."
While Williams has not at all faced Manchester United star Rooney before, the 26-year-old Swansea City centre-back has tangled with Carroll.
New Liverpool striker Carroll snatched a point for former club Newcastle last season in a taut Championship promotion battle, heading home three minutes from time at the Liberty Stadium.
"He's a good player, he's a physical occurrence, he's good in the air, also he's got good feet and his movement's not too bad as well, having played against him before I know it'll be a tough game," Williams added.
"As a player and as an expert you want to play against the best and they've definitely got some of the best players in the world.
"There's no point measuring against normal players, you may as well play against the best and notice whereabouts you are.
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"But that's secondary; the first thing is the team. We want to get the win, if we all played and got the win we'd get that.
"After the game you can look back on your personal recital and see how you did.
"It will probably be the biggest game for a lot of the boys in our team.
"Their squad probably won't say that but for us and for me personally it's definitely the biggest game, the biggest presence and... I'm on top of the world at the moment; I just can't wait to get into the game."
Wales are currently bottom of Group G having lost their opening three matches of the campaign but under the leadership of new coach Gary Speed and in front of a packed Millennium Stadium crowd, there is real hope they can upset the odds.
Tamworth-born Williams, who signed for Swansea in 2008 from Stockport County, may not speak with a Welsh inflection but the 2009 Welsh Footballer of the Year says there will be no divided loyalties on Saturday.
"I was born in England, that's a detail, but lived here for the last three years and I've played 24 times for Wales so I definitely know which side I'm on!" Williams said.
"I know I'm English and always will be but I've got Welsh family and having lived downward here I think it helps."
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