Swansea City have confirmed goalkeeper Michel Vorm will need a knee operation at some point this season.
Manager Michael Laudrup confirmed Dutch international Vorm, 30, will need to have an operation on a niggling knee injury.
But Laudrup said no decision has yet been made as to when Vorm will go under the knife
Gerhard Tremmel started in goal against Hull City on Monday with 18-year-old Slovenian Gregor Zabret on the bench.
Vorm is set to travel with the squad for Thursday's Europa League game against St Gallen despite missing Monday's home draw against Hull.
Laudrup admits it is likely he will need to bring in an extra goalkeeper in January to provide cover when Vorm undergoes surgery, with an expected recovery period of four to five eeks.
"Let's see. It depends when we can do it [Vorm's surgery]," Laudrup said.
"We have games, and there are times when we have very many games, and times when we have less.
"But we always have games and you can't play with one keeper.
"That's much too risky. If something happens to Gerhard then we would have to play with an 18-year-old who is not an experienced goalkeeper.
"That's not good for him or for the team."