Dinh Bac’s 25th-minute goal secured three points and extended Vietnam’s unbeaten run to 27 matches. Yet the performance left coach Kim Sang Sik with plenty to address, particularly his side’s ability to control a game after taking the lead.

Vietnam dropped too deep following the opener, surrendering the initiative to the Philippines. Sustained pressure brought defensive errors, while the low defensive block left too few players available to support transitions into attack, limiting the options for a second goal.

The Philippines’ lack of a clinical finish, a reprieve from the crossbar and an outstanding performance by goalkeeper Patrik Le Giang helped Vietnam hold on.

For all those shortcomings, the contributions of three players making their Vietnam debuts offered encouragement to a coach dealing with injuries and fatigue among established players after a prolonged period of demanding competition.

Adou Minh went straight into the defense alongside Viet Anh and Xuan Manh. The CAHN center-back impressed with his awareness, composure and strength in challenges, making a substantial contribution to the clean sheet.

Khoa Ngo, introduced in the 70th minute, quickly gave Vietnam another useful attacking outlet. His appearance offered Kim a further option as he looks to broaden a squad that has long depended on a relatively familiar group of players.

But it was Williams Minh Hoang who made the most decisive attacking contribution, helping create the only goal.

Collecting Thanh Long’s through ball, the 19-year-old accelerated down the flank and sent in a low cross that struck a Philippine defender’s back and changed direction. Dinh Bac reacted quickly to fire past goalkeeper Falkesgaard.

The deflection brought an element of fortune. Without it, the move might have ended differently. Even so, Vietnam’s pressure and Hoang’s contribution deserved a reward.

Few had expected Kim to hand the teenager a starting place in the opening match. Hoang immediately justified that confidence, showing intelligent movement, sound technique and an ability to create chances. He also settled quickly into the team’s style, combining smoothly with his new teammates.

Despite standing 1.90 meters tall, Hoang was deployed on the right wing rather than as a central striker. That was a calculated choice, with Xuan Son already occupying the central role.

Xuan Son’s early departure from the tournament through injury, however, could make Hoang increasingly important. The CA TP.HCM forward may now be asked to take on more responsibility for scoring alongside Dinh Bac.

Born in 2007, Hoang has progressed quickly. He needed only half a season to establish himself at CA TP.HCM and just a few training sessions with the national team to impress Kim and earn a starting place.

The decision to trust him appears grounded in his qualities rather than an attempt to rush his development. The forward of Vietnamese and English heritage has the attributes of a potential first-choice striker: pace, technique, strength, hold-up play and finishing ability.

His game is straightforward and effective, reflecting a European style, while his size is complemented by nimble movement and deft touches.

Another start against Thailand would therefore be little surprise. Whether he can fill Xuan Son’s role remains an open question, but he has already shown the potential to become a long-term option for Kim.

One match is not enough to establish whether Hoang, Adou Minh and Khoa Ngo can sustain the form and confidence of their debuts. Their performances nevertheless provide welcome possibilities at a difficult moment for the coach.

Vietnam’s opening victory was far from complete. Beyond the three points, though, it revealed fresh alternatives for a side whose coach has spent considerable time reshuffling largely the same personnel.

Duy Nguyen - Dai Nam