 On 27 July 2013, Błaszczykowski won the 2013 DFL-Supercup with Dortmund 4–2 against rivals Bayern Munich.On 26 October 2013, Błaszczykowski scored a goal for Dortmund in the Revierderby against rivals Schalke in a 3–1 win for Dortmund.On 31 August 2015, Błaszczykowski joined Fiorentina for a season-long loan from Borussia Dortmund.