"You don't get points for being silly. We have to play at a good tempo and make sure the crowd is on our side and we get at them all the time, don't give them any rest. That's the best way in these games. Make sure you set your stall out right. You can't afford to take a risk. We want to get to the group stage but we also want to make sure it's a sensible performance," said Ferguson.
Kleberson looks set to get a recall along with Ronaldo.
Ferguson said: "If Kleberson comes through well I will certainly play him, Fletcher had a game for Scotland last Wednesday, and that will have brought him on. He will play and if Ronaldo is fresh and fit enough he may take part on Wednesday but I am not certain. He'd been complaining about a groin injury before he went to Greece, and didn't play the other night, so we'll have to wait and see.
"I don't know what we are going to do. We have to speak to the lad to see how he is feeling. If he has a problem we maybe will have to rest him."