Bundesliga club FSV Mainz 05 will have to do without substitute keeper Finn Dahmen for four to six weeks.
As the Rheinhessen announced, the U21 European champions suffered a ligament injury in the ankle last week in the final training session before the home game against Bayer Leverkusen (3-2).
The injury is treated conservatively. In the current season, Dahmen cannot get past regular goalkeeper Robin Zentner and is still without a minute in a competitive game.