Scotland boss Scott Johnson highlighted missed one-on-one tackles as the cause for his side's loss to Samoa in Durban on Saturday.
Two tries from former Leicester Tigers winger Alesana Tuilagi put Scotland to the sword, with Johnson stating that he was not embarrassed by the defeat but that changes would be made to the side for South Africa next weekend.
Pat Macarthur, Euan Murray and captain Kelly Brown are all major injury concerns.
"I'm not embarrassed, that is not the right word, but I am disappointed by the fact that it was a Test match and you have to win the contact battles to win a Test. We didn't," said Johnson.
"It is a collision problem, there was some great defence but all their tries came on the back of one-on-one tackles that were missed.
"There was nothing else - the last try, one-on-one missed tackle; the early tries, bad positioning or one-on-one missed tackles.
"If you lose them against a side like that who can score, you are in trouble. They are behind your line and you are in trouble.
"You have to acknowledge what you need to do. You can't hide from the fact that to play at this level you have to win the collisions with or without the ball.
"We were not good enough in that area and were punished. In Test matches that is what happens."