Korb played for TuS Preußen Vluyn, Hülser SV and DJK/VfL Tönisberg in his youth before moving to the youth academy of MSV Duisburg in 2004. In 2006, he then joined Borussia Mönchengladbach's youth team,[1] for whom he played in the Under 17 Bundesliga and Under 19 Bundesliga. He made his debut in a senior game in January 2010, with the Borussia Mönchengladbach II in the Regionalliga West, the fourth tier of German football. Until September 2013, he played 94 games in the Regionalliga, scoring five goals.[2]
On 5 May 2012, Korb was handed his first team debut by managerLucien Favre in a 3–0 Bundesliga win over Mainz 05, coming off the bench in the 73rd minute to replace Tolga Ciğerci. On 6 December 2012, debuted in the UEFA Europa League in a 3–0 group stage win over Fenerbahçe.[3] Korb made his breakthrough in the Bundesliga in the 2013–14 season. From matchday 10 onwards, he featured in 22 games - each time in the starting eleven - as a right-back.[2] In the 2014–15 season, he finished the league in third place with Borussia and qualified for the UEFA Champions League in the following season, but the team did not make it past the group stage. In the following season, Korb and Borussia were again eliminated in the Champions League group stage.
Korb joined newly promoted side Hannover 96 in summer 2017.[4] He made 28 appearances in his first season for Hannover, in which he scored one goal. In the following season, he made 12 appearances, while Hannover was relegated to the 2. Bundesliga. There, Korb played 26 matches in the 2019–20 season and scored one goal.[2] He then left the club, as his contract expired.
After Korb was without a club in the 2020–21 season, he joined second-division club Holstein Kiel for the 2021–22 season, signing a contract until 30 June 2023.[5]
He returned to Borussia Mönchengladbach II for the 2023–24 season, where he leads the second team as one of the three senior squad players.[6]
International career
Korb played for the German youth teams at the under-15, under-17 and under-19 levels.[7] He made his debut for the Germany under-21 team on 4 March 2014.
In June 2015, Korb was named by Horst Hrubesch in the Germany under-21 squad for the 2015 UEFA European Under-21 Championship.[8] At the tournament, he featured in all four Germany matches before the team was eliminated in the semi-final against Portugal.[2]
