After the unprecedented highs of the 2019-20 season, Flick wanted to reinforce the Bayern squad, with discussions taking place between the end of 2020 and start of 2021 with then sporting director Salihamidzic. In fact, in as early as January 2020, the German coach spoke to SZ about wanting new signings: "We definitely need reinforcements. I'm thinking of at least two players."
One of the players Flick was desperate to bring to the Allianz Arena was Wirtz, who was just 17 at the time and had made his debut at the end of the 2019-20 season. However, according to details revealed by Matthaus, the Bayern higher-ups weren't on the same page as Flick.