Holland coach Ronald Koeman has criticised Barcelona for signing Ilkay Gundogan.
The Germany midfielder joins Barca on a free transfer from Manchester City.
Former Barca coach and captain Koeman sad: "From the outside, I think we can argue about the signings they're making.
"We can argue about the age of the players. I don't think that neither from an economic point of view, nor from the sporting one, they are looking a lot to the future.
"Gundogan is a great player and you can't argue, as well as (Robert) Lewandowski, but I think it's only a speech for two or three years. You can't sign players like these every season.
"I think it's better to sign 22-year-olds, not 32- or 34-year-old players."