South Africa boss Heyneke Meyer admits that JuandrÃ© Kruger's inside track on the Springbok lineout system is a concern.
Kruger will run out for the World XV at Newlands on Saturday after missing out on selection for South Africa's Test squad.
The Racing MÃ©tro lock has previously been in charge of South Africa's lineouts in the past, with Meyer admitting he would know their system inside out.
What's more, Kruger's lineout skills were honed under Victor Matfield at the Bulls, giving him a good understanding of how the newly-appointed Springbok captain will operate.
"Every now and then we send out emails of all our line-outs and all our plays and JuandrÃ© [Kruger] was very close to the squad," said Meyer.
"He has run our line-outs and he will know exactly what we are going to do. That is a concern.
"There are one or two other players as well that were close to the squad.
"The reason we are playing this game [against the World XV] is to give us a chance to put things in place.
"It will be stupid to focus just on winning this game, change everything and then change back for the first Test against Wales.
"It is going to put more pressure on the line-outs and the way we play. However, this is an opportunity to see where we stand.
"Obviously they will know the gameplan, more or less. I still believe we should use this as an opportunity to be much better prepared for the first Test [against Wales]."
While the fixture is obviously of no major importance in terms of the result, Meyer admitted that South Africa would not play the fixture as if they were taking on the Barbarians.
"It is a bit of a lose-lose situation. It is a friendly, but people expect the Boks to win and smash guys by 50 points every time we go onto the field," added Meyer.
"On the other hand you want to try things. The great thing for me is that it is a tough World XV, probably one of the toughest I have seen. Obviously they have nothing to lose and they will come out to play.
"What is important for us is to stick to our structure. You don't want to go out there and play a Barbarian-type game, that is the type of game you play at the end of the year.
"Yes, we want to play great rugby. I am very proud that we scored the most tries per Test last year, 3.9, which is amazing.
"Although you want to use this game and try certain combinations, you also want to players to get together as a squad and get a game under their belt.
"Wales is a quality side, with big backs, physical forwards. I believe they [Wales] are better on dry fields, as they showed in Australia.
"They are a quality side and this gives us an opportunity. We have one week together [ahead of the World XV game] and this gives us an opportunity to prepare.
"Although it is a friendly, it is still an important game for us."