On 1 October 2019, Gnabry scored four goals in the 2019–20 UEFA Champions League 7–2 away win against Tottenham Hotspur. On 25 February 2020, he scored a brace against Chelsea in the first leg of the Champions League round of 16 in a 3–0 away win. This made him the first player to score six away goals in London in a single edition of the Champions League. On 14 August, he scored one goal in an 8–2 win against Barcelona in the quarter-finals. On 19 August, he scored a brace in a 3–0 win over Lyon in the semi-finals; hence, he has scored nine goals in nine matches in the competition. Bayern won 1–0 over Paris Saint-Germain in the final, to be his first Champions League title along with his teammate Joshua Kimmich, another VfB Stuttgart academy product.