Kimmich and Jung played together for two seasons in Leipzig, jointly experiencing promotion to the 2. Bundesliga. The left-back, who came up through Eintracht Frankfurt’s academy, had almost ended up at MSV Duisburg, but the ‘Zebras’ had their playing license revoked, invalidating Jung’s contract. Leipzig then snapped up the services of the 21-year-old, going on to play a key role in forming his future: “For me as an athlete, that was my big opportunity to prove myself,” recalled Jung. “That was a huge leap forward for me.”
An important moment then was a meeting with his then-coach Alexander Zorniger, who coached Jung in Leipzig, and lured him to Brøndby IF after a mixed year in Ingolstadt. There, alongwith Zorniger and Hany Mukhtar, who had just been named MVP in Major League Soccer, the defender won the Danish Cup, Brøndby's first title after a ten-year spell without silverware. "In Alex Zorniger, I had a coach who had blind faith in me," said Jung of his move to the Danish Superliga. "The time gave me a lot because I played most matches over the four years - all in all, it was a very nice time period."