Shane Williams has revealed his sense of realism will be a key factor when he decides to retire from international rugby.
Wales' record try-scorer, with 54 in 82 Tests, has said several times that this season will be his last at the highest level.
However, whether that is after the current World Cup campaign in New Zealand or the RBS Six Nations Championship in 2012, remains to be seen.
Williams, 34, remains arguably the most powerful attacking weapon available to Wales coach Warren Gatland. His match-winning ability could prove to be a key element in Sunday's crucial Pool D clash against Samoa.
The Ospreys speedster said: "I've said that this is going to be my last season with Wales.
"I am not really thinking about it (retirement) at the moment. My concern is to train well and get selected for these World Cup games.
"This is only my third game since March. As far as I am concerned, I never want to retire. I love playing for Wales.
"But you have got to be realistic as well. You have got the likes of Aled Brew, George North and Leigh Halfpenny coming through and you are not going to get selected forever.
"It is getting to the twilight of my career. I still love it as much as I did when I played my first game for Wales, it's just these younger guys are almost ready to take the mantle and move on."
The current World Cup campaign is now the winger's main focus. He strongly believes that the Wales squad has dusted itself down following the agony of a one-point defeat in Wellington, losing 17-16 to South Africa.
He added: "We are fed up of coming close against the big sides and not winning.
"We have picked ourselves up really well. The more experienced guys have helped the younger guys through."
Gatland is due to announce his team on Friday, with few - if any - changes expected following the Springboks game.