Thailand got two away goals from a 2-2 draw in the first leg on Vietnam's home ground, and they will get to play the second leg at home on Monday.
Besides playing under the heat unlike the chill weather of Hanoi, and the pressure from 25,000 Thai fans, Vietnam will have to win or draw 3-3 in the second leg to claim the title.
Thailand's coach Mano Polking said that he would choose to play offensive in the second leg, despite the advantage in the first leg. Park hopes Polking will keep his word and play openly, instead of going heavy on defense like in the first leg.
The AFF Cup final second leg with Thailand will be Park's last game as Vietnam head coach. His contract with Vietnam Football Federation (VFF) will expire by the end of January.