Eintracht Frankfurt have completed the signing of young German goalkeeper Felix Wiedwald from Duisburg.
Wiedwald's arrival coincides with the club agreeing to release veteran keeper Oka Nikolov, who has joined the Philadelphia Union in Major League Soccer in the United States.
The 23-year-old has signed a two-year deal at the Commerzbank Arena and will join Kevin Trapp and Aykut Ozer in the battle for a starting place next season.
"We are delighted that the transfer went so quickly," Sporting Director Bruno Hubner told Eintracht's official website.
"He is a young German player with development potential and fits exactly to our requirements."