Rob Howley says Wales are desperate to deliver a winning performance against South Africa on Saturday.
Wales have won just one of their past 26 meetings with the Springboks, a 29-19 triumph in 1999 that former scrum-half Howley was part of.
"When we played South Africa back then, we had only just returned from winning a Test series in Argentina," Wales assistant coach Howley said.
"That achievement out in Argentina, in terms of our confidence and self-belief, we carried that on into the South Africa game.
"No doubt, if this side is successful on the weekend it will be a better victory than we achieved back in '99.
"Any Welsh victory is special because Test matches are hard to win, but when you look at that this game it would up there with the best.
"Playing under pressure is going to be key on Saturday. We feel that in our Lions players selected we've got experience, and it is going to be a great game to watch. It won't be for the faint-hearted.
"It is important to earn the right to play in the wide channels that we want to do.
"It is going to be an arm wrestle, however long that arm wrestle goes on for. I think that is the nature of international rugby when two world-class outfits come together."
Wales will be without Eli Walker for the Millennium Stadium clash after the Ospreys wing suffered a hamstring strain in training.
The 21-year-old, who was due to make his Test debut, will be replaced by Scarlets back Liam Williams., with Ospreys centre Ashley Beck taking Williams' bench spot.