The Korea Republic giants, who won the AFC Champions League in 2006, head to Saudi Arabia for the clash with Al Ittihad have scored 26 in the nine games they played in the latest edition of Asia's premier club tournament.
With home advantage still to come on October 26, Choi is convinced that attack will be the best form of attack for his charges at the Prince Abdullah Al Faisal Stadium.
"We will never play defensively even though this is an away match," the 52-year-old former Korea Republic manager said.
"That is not out our style even though we are playing away from home.
"This away match is critical and the most important match for us, but our players have a strong mind set.
"Al Ittihad are technically a good team but their season has only just begun so I think we can beat them."
In the other semi-final first leg to be played on Wednesday, Korea Republic's Suwon Samsung Bluewings will entertain Qatar's Al Sadd.