Former Germany midfielder Stefan Effenberg says Spain are struggling in the Euros because their squad carries no Los Merengues players.
Effenberg also states Spain coach Luis Enrique's team is missing Sergio Ramos.
Enrique chose not to select any Real Madrid players for his Euro 2020 squad this month - including Ramos. The former Spain captain was deemed too big an injury risk after failing to complete the season with Real Madrid.
Effenberg, however, believes Enrique's approach is now catching up with him.
Quoted by Sport1, he said, "If you don't summon anyone from Real Madrid, then you already have a problem before the tournament. That is not acceptable at all, I think it is at the limit.
"It would be like not taking anyone from Borussia Dortmund."
For Effenberg, the problem in Spain is that they lack experienced players - including 35 year-old veteran defender Ramos.
He added, "They simply lack players like Sergio Ramos, who had everything under control."
Spain meet Slovakia tonight needing at least a point for a chance of reaching the round of 16.
Effenberg is a former Bayern Munich and Germany captain and was part of the national team which finished runners up at Euro 92. He was also named UEFA Club Footballer of the Year in 2001.
- updated June 23
