Tuchel guided Mainz to league stability during his five seasons at the club, and gained plaudits for his brand of energetic, attacking football. He also cultivated a reputation for his focus on promoting youth players. He departed Mainz in 2014 as a result of financial disputes, and in 2015, was appointed at fellow Bundesliga club Borussia Dortmund, where he won the DFB-Pokal before being dismissed in May 2017. He was hired by French club Paris Saint-Germain in 2018, where he won two league titles, including a domestic quadruple in his second season, and guided the club to its first UEFA Champions League final. However, Tuchel was dismissed in December 2020 after a poor run of results and a dispute with the club's hierarchy. he was then appointed by English club Chelsea in 2021, where he won the Champions League in his debut season at the London club.