Barca's Ter Stegen faces three months out after back surgery
The Spanish champions signed Espanyol goalkeeper Joan Garcia this summer, who is expected to become the team's first choice, with Wojciech Szczesny as back-up.
"Today is a personally difficult day for me. Physically and athletically, I feel in very good shape, although unfortunately I am not free from pain," said Ter Stegen on social media network Instagram.
"After intensive discussions with the FC Barcelona medical team and external experts, the quickest and safest way for me to fully recover is through back surgery.