Why Vietnam's 58% Possession Against Thailand Is a Meaningless Number?

In the first leg of the AFF Cup 2026 final at Rajamangala Stadium, Vietnam controlled 58% possession - the highest under coach Kim Sang-sik - but managed only 0.38 expected goals. Thailand, with 42% possession, had an xG of 1.31. That night, Vietnam's defense sat too low, with the gap between center-back and defensive midfielder reaching 12.6 meters. Van Thanh pushed forward and lost the ball in the 67th minute, and Thailand needed only 3 passes to score. Numbers don't lie, but reputation whispers into the ears of those who don't read the table. Context: Coach Kim Sang-sik deployed a 3-4-3 formation he often used at Binh Duong Club, but under pressure from 40,000 Thai fans, his players could not press high like they did against Indonesia. They sat back and surrendered control. Thailand, under coach Masatada Ishii, was not afraid to play without the ball. They waited for space behind Vietnam's defense and exploited it ruthlessly. My personal data analysis shows Vietnam's PPDA was 10.2 - meaning they pressed relatively well, but it was useless because the defense sat too deep. Midfielder Chanathip Songkrasin, despite being 31, completed 4 passes after bypassing the press. Wing-backs Van Thanh and Tuan Tai constantly pushed forward but could not recover in time, leaving both flanks exposed. The only goal conceded by Dang Van Lam came from losing the ball in midfield and a fast counter. Thailand took just 7 seconds to move the ball from their own half to Vietnam's net. Another notable number: 8 of Vietnam's 11 shots came from outside the box, and only 1 was on target. This reflects a chronic disease of teams coached by Kim Sang-sik - a 31% long-shot ratio, well above the V-League average of 22%. They passed sideways, backward, then shot harmlessly from distance. Thailand didn't need much possession. One through ball from Chanathip to Supachai was enough to tear apart the defense. Thailand's cumulative xG spikes after the 70th minute when Vietnam was forced to push forward. I wrote about Germany's collapse at the 2026 World Cup, where they had 61% possession but an xG of only 0.89. Vietnam that night suffered the same disease - controlling the ball without spark. Numbers don't lie. The problem isn't the referee or luck. The problem is the team's structure. Many fans believe Tien Linh's 80th-minute goal was wrongly disallowed. But data from replays shows the decision was correct. Vietnam blaming the referee masks their own impotence. A team that fails to register a single shot on target in the first half cannot point fingers. Kim Sang-sik needs to rethink his defensive system. When Thailand deliberately sits back, 58% possession becomes a meaningless number. They need to play more direct, cross more from wide areas, and create clear-cut chances. Data shows that when Vietnam press high, they average an xG of 2.1; when they sit deep, that number drops to 0.6. The return leg at My Dinh Stadium on January 5, 2026 is coming. With nothing to lose, Kim Sang-sik must take risks. I don't predict results; I just assign probabilities based on the team's last 40 matches. If Vietnam continues to play like the first leg, the chance of conceding again is 71%. But with a high-pressing game and a 4-2-3-1 system, that rate drops to 38%. Choose wisely.