After an underwhelming first leg, Vietnam must improve to beat Indonesia in the second leg of the semifinals.
For Indonesia, they were held to a 0-0 draw by Vietnam at theGelora Bung Karno Stadium in Jakarta in the first leg.
Vietnam will have the home advantage, but Indonesia will have the away goal advantage if they score at My Dinh.
Before the game, two South Korean coaches of the teams, Park Hang-seo and Shin Tae-yong turned up the heat with a war of words.
"I do not want to say goodbye to the team with a failure in the semifinal. We will try our best," Park said.
"Indonesia are as strong as Vietnam. There is no stronger team here," Shin said.