Indonesia's Leap Through Squad Depth: How Southeast Asian Football Changed Lanes

On the evening of 26 March 2026, I was sitting in the press area of My Dinh Stadium. My headset was still on, but my pen had already dropped from my hand in the sixtieth minute. Vietnam lost 0-3 to Indonesia on home soil, and what left me speechless was not the scoreline.

The first goal came from a corner. The second came from a transition that took only four passes. The third, in stoppage time, came from a player who had entered the pitch fifteen minutes earlier. I looked across at the opposite bench and realised I had missed one thing for two years: squad depth is no longer a footnote in Southeast Asian football. It has become the game itself.

And I — a man who once announced the wrong birthplace of an athlete on a podium and then told himself he would never open a piece with a results table — had nearly judged an entire football nation by the names of a few stars. I once announced the wrong birthplace of an athlete, and realised I was running in the wrong lane myself.

That is why this piece does not begin with a league table. It begins with a bench.

Context: two paths split from one draw

The second round of AFC qualification for the 2026 World Cup put Vietnam and Indonesia in Group F, alongside Iraq and the Philippines. Iraq finished first, Indonesia second and advanced to the third round, while Vietnam finished third and stopped there. It was the first time in years that Indonesia overtook Vietnam in a World Cup qualifying cycle, and the first time Indonesia reached the third round of any World Cup cycle at all.

In the third round, Indonesia was drawn in Group C with Japan, Australia, Saudi Arabia, Bahrain and China. Three of those six teams have played at a World Cup. Indonesia finished fourth, which carried them into the fourth round — a milestone nobody in Jakarta dared imagine five years ago.

Parallel to the qualifying story, Vietnamese football had a paradoxical 2026. In December 2026, Vietnam won the ASEAN Cup, beating Thailand over two legs. A regional trophy, but no ticket to the third round. Indonesia went the other way: no regional title, but a deeper run on the continental stage.

On the bench, the two nations moved in opposite directions. Indonesia went through Shin Tae-yong and then Patrick Kluivert, appointed in early 2026. Vietnam moved through Philippe Troussier and then Kim Sang-sik. The names are surface. What lies beneath is the story: how two federations build depth into one squad.

Core: squad depth is a sport of its own

When I say squad depth is the game, I am not talking about the number of players on paper. I am talking about the number of options a coach can throw on in the final seventy minutes of a big match.

Look at Indonesia's spine. In defence, Jay Idzes — born and raised in the Netherlands, a Serie A centre-back who has worn the captain's armband. Beside him, Mees Hilgers and Calvin Verdonk, with the physicality and speed of European football. On the flanks, Shayne Pattynama and Sandy Walsh allow Indonesia to play a back three without exposing the channels. In midfield, Thom Haye and Ivar Jenner form a central pair capable of long switches and tight-space recoveries. Up front, Ragnar Oratmangoen and Rafael Struick are two different profiles, letting the coach change approach mid-game.

The notable thing is not that Indonesia has many naturalised players. The notable thing is that Indonesia has naturalised players in every line, not stacked into one position. A team that naturalises only a striker still depends on that striker. A team that naturalises an entire spine can replace the entire spine without changing how it plays.

That is precisely what Vietnam has lacked for two years.

Based on my experience following matches, Vietnam's attack has leaned heavily on Nguyen Xuan Son, the Brazil-born naturalised striker. When Xuan Son is fit, Vietnam has a genuine focal point for long balls and duels. When he is injured, the team loses an entire attacking plan, not just a player. That is the signature of a thin squad in the most important position.

In midfield, Vietnam still leans on Nguyen Quang Hai and the golden generation. In defence, key centre-backs have passed thirty. When a substitution is needed to hold rhythm or change a game, the coach usually has two genuine options, not five.

I want to be clear here: the problem is not the quality of individuals. Nguyen Tien Linh remains a striker who knows how to score in the box. The problem is the structure around individuals. A team with one good striker must always play to serve that striker. A team with three good strikers of three different profiles can play to serve itself.

The mathematics of the bench

Back to My Dinh. Indonesia's third goal came in stoppage time. The scorer had come off the bench. Seen in one match, it is a detail. Seen across a qualifying cycle, it is a pattern.

I once spent a season compiling Japan's goals at a World Cup and found that most of them came from substitutes. I wrote about it and was surprised by how far the piece travelled. The lesson I kept was not the number, but the question: when does substituting become a genuine weapon?

The answer lies in continuity of quality. A substitute is only dangerous when he steps into a system he already knows. If he needs ten minutes to understand what his teammates are doing, he is no longer a weapon. Indonesia under Shin Tae-yong and Kluivert played a framework so clear that a substitute could slot straight in.

That is why Indonesia's naturalisation story is widely misread. People say Indonesia bought success. But if buying naturalised players were enough, many teams would have done it long ago. Integrating a dozen men raised in different football cultures into one coherent block within eighteen months is coaching work, not paperwork.

Contrarian angle: a back three is not progress, it is risk cover

There is one point where I disagree with the crowd. Many say the return of the back three is a step forward for modern football. I think it is how coaches insure themselves.

When a team plays a back four and gets cut open, the blame falls on two centre-backs and two full-backs. When it shifts to a back three, the coach gains an extra body at the back. To the eye, the team looks sturdier. In substance, the coach is buying insurance for his reputation against faster opponents.

Indonesia plays a back three not because they believe it is the future, but because they have three centre-backs good enough to do it, and because they face teams that transition quickly, like Japan or Australia. A back three is a solution to a specific problem, not a tactical faith.

Ironically, Vietnam at times also shifted to a back three without suitable personnel on the flanks. When you play three centre-backs but your wing-backs cannot run for ninety minutes, the system collapses in the exact space it was built to protect.

The blind spot both nations have yet to see

There is one thing neither Indonesia nor Vietnam has solved, and it sits off the pitch.

Indonesia lives on one generation of naturalised players discovered in a short window. When that wave ends, they will return to the domestic league. The quality of Indonesia's domestic league is still far below what a third- and fourth-round Asian qualifier requires. Players like Marselino Ferdinan, who came up through domestic football, are the exception, not the standard.

Vietnam, in the other direction, has a youth system rated more highly, but converts talent into senior caps slowly. The gap between the U19s, the U23s and the senior team remains a black hole. Young players get pushed to the margins at club level, and by the time a call-up is warranted, the generational window has closed.

In other words, Indonesia has depth but lacks foundations. Vietnam has foundations but lacks depth. The 2026 qualifying cycle punished both deficits at once — the only difference was timing.

Sport as a shared language of movement

In football, every goal begins with a run — athletics taught me to see that. A naturalised Indonesian player also begins with a run: from Amsterdam, from Rotterdam, from dirt pitches in a distant country, to a stadium in Jakarta. That movement does not begin with money. It begins with a name, a bloodline, a family.

The transfer market is just a relay race with dropped batons. In this story, the dropped baton belongs not to the players, but to federations slow to reform their own systems.

Takeaway: an open question for the rest of Asia

When Indonesia advanced to the fourth round and Vietnam stopped, what changed was not the table. What changed was a frame of reference. Southeast Asian football must now ask a different question than it did a decade ago. No longer how to find a star. But how to build a spine you can replace at any moment, and a system where a man stepping off the bench needs no minute to understand what he must do.

I still keep the recording of the My Dinh match, not to remember the score, but to remember the moment I put down my pen. Some sporting lessons are not spoken at the ninetieth minute. They are written from the fifteenth minute on the bench.

The lesson from the lane never ends at the finish line. It ends with the next runner — and with whether that runner is ready.