On 14 August, Müller scored a brace and assisted another in the 2019–20 UEFA Champions League quarter-final match against Barcelona, which ended in an 8–2 win. Later on, Bayern won 1–0 over Paris Saint-Germain in the final, which marked the club's sixth Champions League title and Müller's second Champions League title. He finished the season by scoring 8 goals in 33 league matches, two goals in six German Cup matches, and 4 goals in 10 Champions League matches.