Matheus Cunha gave Brazil a much‑needed balance on 20 June 2026, as Carlo Ancelotti’s experimental diamond formation finally clicked in the World Cup group stage. The forward’s intelligent movement and quick release eased pressure on the midfield, allowing Brazil to dominate possession and create several clear‑cut chances.

How did Cunha influence the game?

Cunha dropped deeper than his usual advanced role, linking up with midfield pivot Casemiro and the newly‑installed central midfielder Lucas Paquetá. By pulling defenders out of position, he opened lanes for Vinícius Júnior on the left flank. In the 34th minute, Cunha’s low pass split the Argentine back line, leading to a headed goal by Neymar. His work rate off the ball also helped Brazil maintain a compact shape, limiting Argentina’s counter‑attacks.

Why is the diamond system significant for Brazil?

Ancelotti introduced the 4‑4‑2 diamond to add numerical superiority in midfield, a departure from Brazil’s traditional 4‑3‑3. The change sparked debate among pundits, but Cunha’s adaptability proved the gamble worthwhile. By acting as a bridge between the defensive midfield and the attacking trio, he gave the team a fluid shape that could shift to a three‑man front when needed. The result was a 2‑0 win that kept Brazil atop Group C.

What does this mean for Cunha’s role moving forward?

The performance suggests Cunha could become a regular fixture in Ancelotti’s midfield‑forward hybrid role throughout the tournament. His ability to drop deep while still threatening the box offers tactical flexibility that Brazil lacked in earlier matches. If he continues to produce such link‑up play, he may see increased minutes in the knockout stages, potentially even starting alongside Richarlison in a two‑striker setup.

What are the next challenges for Brazil?

Brazil faces a tough test against the Netherlands on 26 June 2026. Ancelotti is expected to retain the diamond, relying on Cunha’s balance to neutralise Dutch midfield dominance. The South American side will need to replicate the disciplined pressing that stifled Argentina, and Cunha’s role will be central to that plan. A win would secure a top‑two finish and a more favorable knockout draw.

How did the broader football world react?

Analysts on Sky Sports highlighted Cunha’s “intelligent positioning” as the key factor that made the diamond work. Former Brazil captain Cafu praised the forward’s willingness to adapt, saying, “He’s doing what the team needs, not just what his ego wants.” Social media buzzed with clips of his 34th‑minute assist, earning him the nickname “the silent engine” among fans.

The match may not have been a statement victory, but it marked a turning point. Brazil’s balance improved dramatically, and Cunha’s contribution was the catalyst. As the tournament progresses, his role could define whether Ancelotti’s tactical gamble pays off or falls flat.