Wales blindside flanker Dan Lydiate is bracing himself for a Springbok backlash when the pair clash at the Principality Stadium this week.
South Africa, who have lost to England and Italy so far this November, desperately need a victory as the pressure mounts on them as a team.
Wales, despite overcoming Argentina and Japan, have hardly set the world alight though so both sides are under the spotlight this Saturday.
"They'll be wanting to finish the autumn internationals on a high and there will certainly be a backlash coming. Hopefully we can up our game, we need to step up really," said Lydiate when speaking to the WRU website about the prospect of taking on the wounded Springboks.
"They're one of the most physical teams in world rugby, there's no doubt about that, and if you don't stop them it's going to be a hard day at the office and there will be a high scoreline. Whoever is selected it's going to be a tough challenge, but I'm sure the boys will definitely step up.
"They're not a poor team by any means, and you want to play against the southern hemisphere teams. At the end of the day, when you take to the field you want to win every game, and it will be no different against them. For them it will be the same."
Lydiate scored the opening try of the game against Japan last week but it was only a late Sam Davies drop-goal that saved Wales from a shock loss to the Brave Blossoms, which leaves the flanker determined to improve.
"We need to step up really. We've won the last two games, which is always good, but we need to keep building on performances," he said.
"We took a step back from the good win against Argentina last week. If we get the result next week all you'll remember are the results, not the spluttering in performance. We want to build on each week and today wasn't good enough, but we'll put that to bed and train hard for next week."