	On 5 May 2012, Korb was handed his first team debut by manager Lucien Favre in a 3-0 Bundesliga win over Mainz 05, coming off the bench in the 73rd minute to replace Tolga Cigerci. On 6 December 2012, he made his UEFA Europa League debut, in the 3-0 group stage win over Fenerbahçe.