TOKYO, 26 Oct - Wales prop Tomas Francis has been reliving some painful memories in an effort to banish them in Sunday's semi-final against South Africa.
Francis, above centre, came on as a replacement at Twickenham four years ago but could not help Wales stop the Springboks grabbing the winning try with a few minutes left.
From a scrum late in the game, South Africa number eight Duane Vermeulen sent a clever pass to scrum-half Fourie du Preez, who darted over (see video below) to give the Springboks a 23-19 victory.
"It wasn't the best scrum for me. I'll always remember that," said Francis. "I know Vermeulen did a good bit of skill but the scrum could have been better. I've seen the quarter-final back a few times recently.
"There was a time where we lost a few games in the last few minutes to southern hemisphere teams and we went through a series of watching them to try and help us.
"So far it's worked."
Wales's only defeat in the past six meetings with the Springboks was that quarter-final loss at RWC 2015, but results have been close and Francis is expecting a physical battle for supremacy in Yokohama.
"It's always been a good contest. I've been against Steven Kitshoff and the 'Beast' (Tendai Mtawarira) a few times and they are both very good players.
"They can't pick between them, they have both had starts, so for me it's a great challenge.
"Every game is getting more and more physical. France had a long turnaround and they really brought it on last weekend. South Africa will be exactly the same.
"As a front row and as a pack we need to step up. We weren't good enough against France, we let them outmuscle us a bit and it doesn't sit well with us, but we are going to go out and try and rectify that."
Francis admits Wales got lucky in the 20-19 victory over France in the quarter-final after second-row Sebastien Vahaamahina was sent off after 48 minutes.
But he believes they can move a step closer to giving outgoing head coach Warren Gatland a dream send-off after 12 years at the helm.
"We definitely got lucky, France were the better team on the day, the red card decided the game in the end. But we stuck in there," Francis said.
"There were times before half-time when we could have let them score again and the game would probably have been done. As a team we always want to be in the game, in the arm wrestle, and being in that gave us a shot at the end.
"We are not happy with the performance but you can't delve too much into that this week, you've got to try put it to bed, learn from it and hopefully there will be an improved performance this week.
"Warren's belief is second to none. He gives us the confidence and he's given me every cap I've got. I owe him a lot.
"But he doesn't want it to be about him, he doesn't want to be in the limelight. He wants it to be all about the players. We want to do ourselves proud and by doing that, make him proud as well."