روبرت ليفاندوفسكي
In the 2017–18 season, Petersen was the top scoring German in the Bundesliga with 15 goals, finishing second to only Robert Lewandowski of Bayern Munich. On 19 January 2019, he scored his 38th league goal for Freiburg, breaking the club's all-time Bundesliga goalscoring record previously held by Papiss Cissé.