Madrid, Sept. 5 -- Spain and FC Barcelona will be worried by Lamine Yamal's back problemthat saw him substituted by coach Luis de la Fuente towards the end of Spain's 3-0 win inBulgaria.

The win gave Spain a flying start to its 2026 FIFA World Cup qualifying campaign on Thursday night., with Yamal again playing an important role in attack.

However, the Barcelona forward had a slight back issue that saw De la Fuente rest him in the 79th minute.

Although he should be able to play in Sunday's game against Turkiye, Yamal's problem is more ofa long-term worry. Due to the 18-years-old's vital role for both club and country, he gets very little rest.

Yamal has already played all 90 minutes of Barca's first three La Liga games of the season, wh...