Including the £80million bonus Lionel Messi received for signing a new contract, Barcelona have now spent close to £350m on forwards alone since the summer following Ousmane Dembele's arrival in the summer and Coutinho's move from Liverpool.
He added: "[Dembele] is very young and has a lot of talent.
"We are all waiting for him to return to his best.
"I don't doubt his performances and the work that he will do at the club.
"It is very difficult to change team; the body has to adapt and his diary and nutrition will be different."