Before the 2015–16 season, RB Leipzig invested further in strengthening the team, signing Davie Selke from Werder Bremen, Atınç Nukan from Beşiktaş, Marcel Halstenberg from FC St. Pauli and Willi Orban from 1. FC Kaiserslautern. Selke was signed for an estimated €8 million, Nukan for an estimated €5 million and Halstenberg for an estimated €3 million. Meanwhile, Joshua Kimmich was sold to Bayern Munich and Rodnei left to join 1860 Munich as free agent. RB Leipzig also made transfers with its unofficial sister club, FC Red Bull Salzburg. As several times in the past, three players were signed on free transfer, among them the Austrian national Stefan Ilsanker. They were joined by Massimo Bruno and Marcel Sabitzer, returning to RB Leipzig from being on loan. These transfers provoked anger among the fans of FC Red Bull Salzburg. For several years FC Red Bull Salzburg had transferred some of its best players to RB Leipzig. Fans of FC Red Bull Salzburg were heard singing chants against RB Leipzig during a game in the ÖFB-Cup in April 2015, after Austrian media had reported that Stefan Ilsanker could move to Leipzig during the summer.
