Abdulrazak Al Husein netted twice as Syria upset their more illustrious opponents 2-1 three days ago, meaning a win over Alberto Zaccheroni's side would see them qualify for the quarter-finals.

"This is a very difficult match for us, we respect the Japanese team, they are strong," said the Valeriu.

"More important for us is that we have to put in another good performance and prove to the world that the victory over Saudi Arabia was not a fluke."

However, the Romanian has worked hard to make sure his team do not get carried away following their impressive start.

"After our win against Saudi Arabia, I spoke to my players and told them that they should not get over confident and they should be realistic," he added.

"I think qualification is still very open for all four teams.

"In football there is no yesterday, there is today and tomorrow. "Starting the tournament with a win has been good for the players' morale but now starts for us the hardest part, which is to keep it going."

Japan needed an injury-time equaliser to salvage a draw against Jordan in their first game and Zaccheroni is keen for his men to be more clinical against Syria.

"It will be a very tough match," said the former AC Milan boss.

"Syria beat the Saudis and the impression I have of them is that they are very organised and motivated.

"We now need to make sure we use our chances and score. My target has not changed, which is to play well in this competition.

"We are in a very important position in Asia; it is a big continent and all countries play different styles.

"I have not seen Australia against India but otherwise I have watched all matches and the level is very close.

"The Asian Cup is a very short competition. Every game is important but at the same time we need to keep our composure and not let emotions affect us."