Youth football in Portugal: How Futebol 9 optimally develops U12‑U13 players

In Portugal, football is regarded from a young age as a fine art of technique, speed of thinking and precise decision‑making. For players in the U12 and U13 categories — locally known as Infantis (Sub‑13) — the step up to Futebol 9 is a crucial phase in their development. This format is not a random step, but a thoughtful, didactic transition moment in a training philosophy aimed at shaping technically high‑quality footballers, ready for the world elite. In this age group the foundation is laid for everything that follows: the full eleven‑a‑side game, understanding space and functioning under pressure. Portugal deliberately chooses a step‑by‑step build‑up of 5→7→9→11, with each phase having a specific learning objective. For parents, coaches and the players themselves, understanding this phase is essential to set the right expectations and to support development optimally.

What is Futebol 9 and how does it differ from earlier formats?

Futebol 9, also known as 9‑against‑9, is the step between the small‑scale F7 (7‑against‑7) and the full F11 (eleven‑a‑side game). In Portugal this format is offered on a pitch whose dimensions lie between those of a seven‑ and an eleven‑a‑side field. This means players are introduced for the first time to larger spaces, but still within a framework where quick contact with teammates and opponents is maintained. The pitch is large enough to practice positional play and space utilisation, yet small enough to retain pressure and intensity. The ball size is a combination of size 4 and 5, depending on the player's strength and development — a practical adjustment to ensure both technical comfort and preparation for the adult game.

The match structure consists of two halves, without specifying an exact duration in the given facts, but in practice it is usually around 30 to 35 minutes per half for this age group. This is longer than in F7, increasing the focus on endurance and mental concentration. Importantly, Futebol 9 in Portugal is seen as a didactic transition step: it is not a final destination, but a learning environment where players gradually become accustomed to the complexity of the full game. Thus they get an early taste of positions, responsibilities and tactical structure, without the step becoming suddenly too large.

Why Futebol 9? The training philosophy behind the step

The Portuguese youth academy is globally respected for its focus on technique, vision and the ability to make smart choices under pressure. The core of this philosophy is training players in small space. This may sound contradictory — the pitch is larger than in F7 — but the principle remains: the opponent’s pressure is always close, forcing players to think quickly, pass accurately and act with technical control. Futebol 9 provides the perfect balance for this: enough space to experiment with positions and movement, yet limited enough to learn to correct mistakes quickly.

The step‑by‑step build‑up of 5→7→9→11 is deliberately chosen. Each phase builds on the previous one: in F5 young players learn basic skills in a very small space; in F7 more tactical structure and cooperation are added; F9 introduces responsibilities comparable to the eleven‑a‑side game, such as full‑back defenders, midfield organisation and attacking transitions. The transition to F11 around U15 is then not a cultural shock, but the logical continuation. Moreover, this model fits perfectly into the so‑called sales model of Portuguese clubs: the aim is to deliver players who are technically and tactically mature, often for international transfers. Therefore quality is central, not just results.

Offside and game structure: learning moments in youth

One striking aspect of the Portuguese approach is the late introduction of the offside rule. In the U12‑U13 age group the offside is generally not yet fully applied, or only in an adapted way — here referred to as penalty_area_16m. This means the offside only applies from the sixteen‑meter line, or it is introduced around U13 or even U15. This approach is pedagogically sound: young players must first learn to move, find space and pass, without being afraid of being taken out of the game. Only when they understand what space is and how to create it actively is the offside fully introduced.

This gradual approach prevents players from adopting a rigid, defensive mindset too early. Instead of only looking backwards or being afraid of an offside, they learn in Futebol 9 to actively fill, cut and support space. It stimulates creativity and attacking football. Only when this foundation is laid is the tactical layer of the offside added. Thus it does not become a penalty rule, but a component of tactical understanding: when do I make a run, when do I stay free, and how do I force the opponent into mistakes?

Practical tips for coaches and parents

For coaches it is important not to view Futebol 9 as a smaller version of F11, but as a unique learning phase. Focus on maintaining technical quality in increasing space. Use training games where players repeatedly have to make choices under pressure: for example 4‑against‑3 in a modified zone, or transition games with a mandatory first pass. Let players experiment with positions — a striker may also play as a midfielder — so they learn to understand the game from multiple perspectives.

Parents can support their children by emphasizing the value of mistakes. In this phase it is not about winning, but about learning. Ask during or after the match: “What did you find difficult?” or “Which choice would you make differently?” instead of “Why didn’t you score?”. Moreover: encourage them to play a lot, also in the street, on the playground or with friends — there children often develop their best technique and footballing feel.

Also pay attention to the ball size: a ball that is too large or too heavy hinders technical development. Ensure the ball matches the physical capabilities of the player. And finally: be patient. The step up to F9 is a process. Some players may initially seem lost on the larger pitch — that is normal. With time, repetition and proper guidance they grow quickly.

In summary: Futebol 9 in the Portuguese youth academy is a cleverly designed bridge between small‑sided games and full‑scale football. It combines technical sharpness with tactical development, in an environment that is both challenging and educational. For players in the U12‑U13 age group this is the phase where they truly learn to play football — not only with their feet, but also with their head.