FC Luzern has re-signed 24-year-old Swiss goalkeeper Raphael Radtke from Schaffhausen, for whom he made 11 competitive appearances last season. Radtke is a former youth player for Luzern who progressed through the club's youth system to the U21s and was previously part of the first-team squad during the 2020/21 season. Following loan spells at SC Buochs and FC Biel, he moved to Schaffhausen. He now returns to Udo Portmann's team and is expected to be the second-choice goalkeeper after Pascal Loretz. His new contract with the club is valid until June 2028.