Voller believes ter Stegen is the best goalkeeper available to Germany, but he will need to play consistently after recovering from a back operation in order to guarantee a place on the team.

Ter Stegen is currently behind Joan Garcia and Wojciech Szczesny in the pecking order at Barcelona, making a January transfer his only chance of making the World Cup roster next summer.

Voller emphasized that a goalkeeper of ter Stegen's caliber deserves to play in the World Cup and should be the starting goalkeeper for Germany.

Voller hopes ter Stegen returns to action soon, either with Barcelona or another team, and believes it's essential for his return to the national team.

Voller also stated that if ter Stegen returns to playing, he will likely be the goalkeeper for the World Cup, which would be beneficial for the team.