The recently-crowned AFF Cup champion may have among the youngest squads in the Asian Cup but that, promised Park, won't stop them from giving Carlos Queiroz's Iran a tough fight, the-afc.com reported.
"We will be playing the strongest team in Asia tomorrow. They are technically, tactically and physically better than us but having said that, we will play to our strengths to get the desired result," said Park.
"It will be very hard for us as Iran is a highly experienced side but my players have got strong mental strength and I believe we can overcome Iran."
Vietnam, added Park, has forgotten about its heartbreak against Iraq, which saw it conceding a late goal as it fell 3-2 to the West Asians in their opening Group D tie.
"It was disappointing as we led twice only to lose but now, we must focus on Iran and getting a good result against them."
Queiroz, meanwhile, did not hide his admiration for Vietnam, saying he found Saturday's opponent even more impressive after watching its match against Iraq.
"I had seen Vietnam's matches in the buildup to the tournament and I thought they were a good side but after watching their performance against Iraq, I have to say they are a very good side," said Queiroz.
"They faced Iraq, one of the favorites to win the Asian Cup, and for 90 minutes, Vietnam gave the match their all. They led twice and, despite football not being about being fair, I must say that they deserved, at least, a draw.
"I am not surprised as I know about the Vietnam head coach. He is a good coach and he has good players."
This, insisted Queiroz, is why Iran will not take Vietnam lightly.
"This is a team that has played 13 matches since October. They won the AFF Cup and this shows how seriously Vietnam are about doing well in the Asian Cup.
"Iran will never make the mistake of underestimating them because that is not how we are built."
Queiroz explained that in his eight years with Iran, he had instilled values in the squad which were very dear to him.
"We are not an arrogant team and as the leader of my team, I always like to share fundamental values with my players. The foundation is always to respect teams.
"It doesn't matter who the opponents are as it is always the same value of respecting them."
Iran, said Queiroz, will face Vietnam with the focus and drive that has made them what they are.
"We are going into this game with our normal attitude, which is to win. It will be the same approach Vietnam take and having watched them play against Iraq, we will start fully alert as we know they can hurt us.
"Having said that, it is our responsibility to qualify for the next round and that is exactly what we will try to do."