Juanfran concedes Deportivo La Coruna teammate Marlos Moreno has struggled to settle at the Riazor.
Big things are expected from the Colombian following his loan arrival from Manchester City.
But Juanfran admits Moreno is currently battling and says: "He's a very young boy, comes from Colombia, the change is very big and I think he is very depressed.
"He has very good condition, there are times when he does good quality stuff, but also is under pressure to do it all the time as he comes from Manchester City.
"He is not enjoying it, he's not sad, but he's worried."