Tuchel began his second season at PSG by retaining the Trophée des Champions on 3 August 2019, in a 2–1 win over Rennes. He also won his first league game of the season, defeating Nîmes 3–0 at home. However, PSG lost 2–1 against Rennes in the club's second league game. In the club's first game in that season's UEFA Champions League, Tuchel received praise for his tactical setup as PSG defeated thirteen-time winners Real Madrid 3–0 at home; the victory occurred without recognized first-team players Neymar, Edinson Cavani, and Kylian Mbappé. He later guided the team to qualification to the first knockout stage with two group games to spare, following a 1–0 win over Belgian club Club Bruges on 6 November. Just under three weeks later, Tuchel led the club to top spot in their group after securing a 2–2 draw against Real Madrid. The club then embarked on a nineteen match unbeaten run in all competitions, recording a number of high scoring victories; PSG scored six goals against Linas-Montlhéry and Saint-Étienne in the domestic cup competitions in January, while they scored five against Montpellier in the league. Notably, the latter game contained controversy, as Tuchel was seen to be in a heated conversation with Mbappé following his substitution.