Spanish national coach Vicente del Bosque is worried that there may be a shortage of homegrown talent at the top clubs in Spain.
Four of Real Madrid's starting XI in their recent win over Malaga were Spanish, while Barcelona started with three as they beat Valencia 2-0 on Saturday.
This is a worry for the Spanish national team coach, as it makes his job to progress the team difficult.
And despite admitting he is happy to see the Spanish teams do well in the Champions League, Del Bosque believes it is the homegrown talent that needs to be improved in Spanish football.
"Every time, I am struggling to find Spanish players in the big sides, that does not mean it's bad for the clubs, but logically it is a little problem for us," Del Bosque is quoted as saying on Goal.com.
Spanish teams tipped to advance to semi-finals
Real Madrid and Atletico will meet in the second leg of their Champions League quarter-final on Wednesday, which will guarantee one Spanish team makes the semi-final.
Meanwhile Barcelona are inches away from the semis as they take a 3-1 lead over Paris-Saint-Germain back to to the Nou Camp for Tuesday night's game.
And Del Bosque believes it is good that the competition will have Spanish semi-finalists, but refused to pick who he thought would win the Madrid derby.
"The best team will win," he added. "It's good that we will have Spanish semi-finalists."
Del Bosque will hope that some of the Spanish contingent will make an impact in the semi finals, as he begins thinking about his selections for the European Championships next year.
Will Spain win Euro 2016? Have your say in the comments below!
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms