The feud between Iran coach Carlos Queiroz and his South Korea counterpart Choi Kang-Hee has continued as they prepare for Tuesday's crucial World Cup qualifier in Ulsan.
Last week, Queiroz accused his South Korea counterpart Choi Kang-hee of "humiliating" the Iranian people by claiming he and his players had been "badly treated" around their 1-0 defeat in Tehran last year, saying he should issue an apology.
Choi declined to do so and said he wanted to knock Iran out of the competition, leaving Queiroz to watch it at home on television.
The tight situation in Asia Group A means South Korea, top of the table on 14 points, could take one of the group's two automatic berths even if they lose to second-placed Iran, who are currently a point behind. Uzbekistan, in third, have 11 points but a poorer goal difference.
A draw should be enough to secure automatic qualification for both teams because Iran have a superior goal difference to the Uzbeks.
But Choi said he was determined to defeat Iran "no matter what" and told reporters: "It looks like Iran is nervous. When feeling burdened or chased after, you talk a lot and engage in unnecessary provocation.
"I will defeat Iran no matter what. Coach Queiroz will be watching the Brazil World Cup on TV."
Mindful of the impact that goal difference could still have, Quieroz earlier accused South Korea of not maintaining their momentum in their 4-2 win over the Uzbeks on Friday.
He claimed: "South Korea did not do its best in the game against Uzbekistan. I will buy an Uzbek uniform and give it to Choi as a present."
However, he later said he had decided against doing so, adding: "I was going to but didn't [bring an Uzbek jersey]. I was going to exchange jerseys and shake hands with Choi after the match.
"I would like us to congratulate each other on going to the World Cup together. I am willing to give an Iran uniform to Choi."
After South Korea's Son Heung-Min had claimed he would make Iran shed "blood tears" on Tuesday, Quieroz said: "I think we have to stop here.
"I have been a coach for 30 years, and have never experienced a soccer match of blood and revenge. We will respond with soccer to the revenge, and with sweat to the blood."