Answer
Großkreutz left Borussia Dortmund in 2015, after having been with the club for 11 years. He had been a key player for the team, helping them win the Bundesliga title in 2011 and 2012, as well as the DFB-Pokal in 2012. However, he fell out of favor with the club's new manager, Thomas Tuchel, and was eventually sold to VfB Stuttgart.