Marc-Andre ter Stegen admits he's frustrated over his situation at Barcelona.
Ter Stegen, who suffered an injury in preseason, has found himself playing second fiddle to Claudio Bravo after arriving in the summer from Borussia Monchengladbach.
"My current situation is not easy for me.
"I have to be patient. I'm doing everything possible to prove myself in training and to make things difficult for the coach. I've had some good performances, but people always remember the bad times.
"The errors are human. Manuel Neuer, Iker Casillas and Roman Weidenfeller make mistakes."
Ter Stegen added: "Everything is a little different here. One player has won several Ballon d'Ors, others have won European and world titles and the great players here are world class."
