Danny Mills says Argentina hold no fears for him despite his World Cup baptism of fire against Sweden.
The England right-back is expected to keep his place for Friday's clash with the Group F leaders despite his mistake leading to Sweden's equaliser in the opening game.
And the tough-tackling 25-year-old told BBC Sport Online he was "relishing" the prospect of a date with England's old enemy, who are favourites to win the competition.
"That's a tricky one," Mills said when asked if Argentina would be the toughest opponents he has ever faced.
"I suppose the importance of a game in the biggest tournament there is in football terms makes this match against one of the competition's favourites a tough one.
"Then there is the history of previous encounters between us both, but I always relish these challenges.
"Once you get out there it's a game of football, it's as simple as that really."
With Gary Neville left at home because of injury, Mills faces no real competition for the right-back berth - with Wes Brown showing little in the warm-up matches.
The Leeds United defender said he "would like to think" he will retain his place, adding: "I feel my performance over 90 minutes against Sweden was more than satisfactory, but then again the manager will pick what he considers to be his strongest side for each game."
Millions of television viewers around the world saw how disappointed Mills was after that mistake against the Swedes, by virtue of a close-up in the aftermath of Niclas Alexandersson's leveller.
"I was just so disappointed that they had equalised, full stop," he confessed.
"To get off to a winning start with three points was the plan, but we've got one point and we have to build on that."
Mills had a confident game aside from his error
Mills' club captain at Elland Road, Rio Ferdinand, plays alongside him in the England backline and Leeds colleagues Nigel Martyn and Robbie Fowler are also in the squad.
But the former Norwich and Charlton full-back insisted he did not turn to any of them in the few days after the Sweden game.
"I didn't need picking up," he said.
"I knew as soon as we kicked off after their equaliser that it was important to stay in total control and not spend another second dwelling upon what had happened.
"I'm a professional which means I always have a positive attitude. No one points the finger at anyone in this squad.
"We are all part of the same team and realise it's important for us all to focus, be aware of our strengths and work for each other.
"If you are asking me whether any of the boys gave me encouragement to keep going, well of course, but we all constantly talk and make sure we are all positive and fired up at all times."