He was a coach at Ajax and knows the club's philosophy better than anyone else, which is why De Boer's comments, who also played for the Catalans, were reported by Mundo Deportivo.
The now Atlanta United coach said he is surprised by the Ernesto Valverde's decisions regarding the great Dutch promise: "I saw the last game and he was playing almost as a winger ... but that is not his position. Frenkie needs to be in the middle or as a controller of the game."
In addition to showing his surprise, he also had some harsher words for the Barcelona coach: "I do not know what Valverde wants to do with him." He also talked about Busquets and the experiments of using De Jong as his replacement: "I think Busquets is getting older, but I still see him able to keep performing on the pitch."
So far, Frenkie has played the first three league matches of Barcelona and in none of them has shown his best face. Valverde placed him in a more backward position in his debut and as interior left in the clash with Osasuna, but it seems the coach still has ti figure him out.