Thai fans reacted fiercely to Vietnam's 6-0 victory over a Korean team.

Thai supporters offered numerous mixed reactions after the Vietnamese team defeated Siheung FC 6-0 in a friendly training session in Korea.

The Vietnamese national team's 6-0 triumph over Siheung FC During a closed-door friendly in South Korea, this result quickly drew attention from regional media and supporters. Despite being just a training match, the dominant display by Kim Sang Sik's squad sparked diverse reactions, particularly among Thai fans—Vietnam's main competitor in the upcoming ASEAN Cup 2026.

On Southeast Asian football forums, numerous Thai fans believed that the Vietnamese team is taking their preparation for the upcoming tournament very seriously. One user wrote: "Vietnam isn't just getting together for fun. They picked South Korea for training, held closed-door friendlies, and are clearly strategizing meticulously for the AFF Cup 2026." Another comment stated: "Keeping matches closed prevents Vietnam from exposing their tactics. That's a clever approach."

A considerable number of Thai fans also praised the depth of the Vietnamese squad under Coach Kim Sang Sik.. The fact that multiple different players found the net in the victory over Siheung FC—including Hai Long, Hoang Hen, Viet Cuong, and Dinh Bac—is viewed as an indication of intense competition for starting spots. One fan commented: "Vietnam isn't just relying on a handful of stars. They now have more choices than before."

Additionally, several remarks highlighted the inclusion of naturalized players and overseas Vietnamese as elements that could make Vietnam even stronger in the ASEAN Cup 2026. One Thai fan observed: "If the Vietnamese diaspora players adapt well, Vietnam remains the top contender for the title. Thailand must not underestimate them."

Nevertheless, some more cautious voices emerged. A segment of Thai fans argued that the 6-0 victory doesn't mean much, since Siheung FC is merely a third-tier K.League side. One comment expressed: "A big win is nice, but the opposition wasn't strong. Vietnam needs to play against K.League 1 clubs or better national teams to get a true evaluation."

Despite the variety of viewpoints, the reactions from Thai fans indicate that the Vietnamese team is still regarded as a formidable regional powerhouse. The victory over Siheung FC may be merely a benchmark, but the manner in which Coach Kim Sang Sik quietly builds his squad, conceals his tactics, and fosters internal competition is causing Southeast Asian rivals to take particular notice.