However, Russian-born boss Krestinin said the Kyrgyzs are motivated to spring a major upset in Bishkek against the Asian champion.
"Without defence there is no attack, as we know," Krestinin said, speaking through a translator, on Tuesday.
"We will more pay attention to the defence but at the same time we will be trying use our different areas where we have more strengths.
"We have a full strength team and it's not a cup game, it's a long distance tournament.
"And after tomorrow's game we will analyse what we have done and what we have missed. But as of today we have good motivation."
Krestinin last week banked a breakthrough victory as Kyrgyzstan coach - his first win in seven internationals coming in a 3-1 World Cup qualifying victory in Bangladesh.
But the manager of the 177th-ranked nation conceded Australia had the edge when it came to experience of big games.
"We always try to win, we try to show our best but this is football - we know that tomorrow we will play against the Asian champions," he said.
"Certainly our players' lack experience in international games.
"When we play against big teams like China and Australia that is what we lack at the moment.
"But tomorrow's game, after the first whistle and three or four minutes, nerves will be gone and I think we will be okay."
Kyrgyz defender Talant Samsaliev didn't appear so certain.
"I see that some (Kyrgyz) players obviously are a bit nervous because of the Asian champions," he said. "But ... they are very sure they will do their best."
