But an own goal by Im Vakhim six minutes from time gave the Vietnamese the upper hand and Dinh Bac scored his second of the game with a clever lofted finish over goalkeeper Koy Salim with a minute left of regulation time.

Vietnam will face the runners-up from Group B, which will be concluded on Saturday, with Kim Sang-sik’s side travelling for the first leg on August 16 before hosting the return in Hanoi three days later.

The Singaporeans, meanwhile, will host the winners of Group B in the first leg of their semi-final on August 15 after coming back from a goal down to pick up the draw needed to progress to the last four.

After a goalless first half, the Indonesians went in front two minutes into the second half when Ragnar Oratmangoen converted at the second attempt following Dony Pamungkas’ cut back from the left touchline.

But Ilhan Fandi levelled the scores in the 65th minute, the Lion City Sailors forward poking the ball into an empty net after a mix up between goalkeeper Cahya Supriadi and defender Rizky Ridho.

Indonesia’s Rizky Pratama almost restored his side’s lead late in the game when he was played in on goal by Thom Haye, but his shot could only find the side-netting as John Herdman’s side fell short.

Photos: Vietnam Football Federation, Football Association of Singapore