Success continued ahead of the 2019–20 season, with Sancho providing an assist and scoring in a 2–0 DFL-Supercup victory over Bayern Munich on 3 August 2019. Later that month Sancho agreed a new contract with Dortmund. Sancho's goal in Dortmund's 3–3 draw with RB Leipzig on 17 December meant he had scored in seven consecutive games for the club (including in Champions League matches against Barcelona and Slavia Prague), bringing his talley up to 15 goals and 16 assists in the calendar year of 2019. Sancho's three goals and three assists in five league matches during February 2020 saw him named Bundesliga Player of the Month for the second time in his career.