Answer
The answer is Borussia Dortmund. Henrikh Mkhitaryan joined Borussia Dortmund from Shakhtar Donetsk in the summer of 2013 for a fee of €27.5 million. He quickly became a key player for the club, helping them win the DFB-Pokal in his first season and the DFL-Supercup the following year. Mkhitaryan also impressed in the UEFA Europa League, scoring 10 goals in the 2015–16 season as Dortmund reached the quarterfinals.