The season began with Bayern Munich winning the 2017 DFL-Supercup against Borussia Dortmund, in which Lewandowski scored the opening goal for the Bavarians by controlling a low cross from Joshua Kimmich to cancel out Christian Pulisic's opener. The match ended 2–2 after extra time. Lewandowski, again, scored the first penalty of the shootout as Bayern eventually won 5–4.