The midfielder is a target for the German giants and Barca are fuming after learning of Bayern making contact with the youngster.
Sport1 says the management team around Barcelona president Joan Laporta is "increasingly irritated" by Bayern's transfer market behavior. The German champions attempted to poach midfielder Pedri (19) and right-back Sergiño Dest (21) without consulting Barça.
An insider close to the Catalan board said: "It is true that Bayern have exchanged views with Barça players without informing Barça.
"I wouldn't say that the relationship between the clubs is very bad, but it's certainly not what it used to be."
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