What happened?

Portugal suffered its first tournament loss when left‑back Nuno Mendes felt a muscle strain at minute 53 of the second half against Spain in the World Cup 2026 round‑of‑16. The substitution came right after Lamine Yamal's run, which triggered the discomfort. Nelson Semedo, of Fenerbahçe, came on to fill the spot, while João Cancelo stayed on the right.

How does it affect Portugal's campaign?

Mendes' injury removes one of Portugal's most dynamic left‑backs, a player who creates offensive chances and seals defensive gaps. Roberto Martínez loses a speed element that was being exploited against Spain's back line. Without Mendes, the side will need to tweak the formation, perhaps bolstering the centre‑back partnership or using a more seasoned full‑back in upcoming matches.

What will Martínez decide next?

Martínez has already named Semedo as the first choice, but the squad depth offers alternatives like Nuno Tavares or even a tactical shift, moving Cancelo to the left flank. The decision will hinge on Mendes' medical assessment in the coming days and the strategy against the next opponent, still unknown. The coach might also adjust the midfield to offset the loss of the full‑back's forward support.

When will the injury severity be known?

Imaging scans were performed immediately after the 06 July 2026 match. The medical team reported a muscle discomfort, but did not confirm a prolonged lay‑off. Portuguese media will monitor the progress closely, as the announcement on Mendes' availability for the quarter‑finals is expected later this week.

What does this mean for fans?

Portugal supporters already feel Mendes' absence, a key figure since the group stage. Hope now rests on Martínez' ability to reshuffle the defence without sacrificing the fluidity that defined the campaign so far. Meanwhile, fans can expect another hard‑fought game, with Portugal battling to advance despite the setback.