Former Borussia Dortmund player Kevin Grosskreutz has criticised his former club for selling midfielder Jakub Blaszczykowski to Wolfsburg.
Blaszczykowski, 30, joined Wolfsburg for a €5 million fee on Monday, signing a three-year contract.
"I wish you all the best. Gratitude only exists with the fans. Nobody will give you a second chance if things aren't going your way -- it is what it is nowadays," Grosskreutz wrote on his Instagram.
Grosskreutz, 28, left his boyhood club for Galatasaray in 2015 to seek regular football after only being given limited chances to play under Thomas Tuchel.
He added: "Football isn't what it used to be anymore... The transfer fees are simply disgusting - only success and commerce counts."
Wünsche dir nur das beste Fisch! Dankbarkeit gibt es nur noch von den Fans!!! Läuft es mal nicht so, dann gibt dir keiner ne zweite Chance - so ist das leider heutzutage ! Der Fußball ist einfach nicht mehr das was er mal war ... Heute sind die Summen einfach Ekelhaft - es geht nur noch um Erfolg und Kommerz . Weiterhin viel Glück, Kuba ����
A photo posted by Kevin (@fischkreutz) on
Blaszczykowski has also not been a part of Tuchel's plans since the head coach took over from Jurgen Klopp in 2015.
The Poland international was loaned out to Fiorentina in an attempt to pick up regular playing time after dealing with injuries at the start of the 2015-16 season.
While on loan he only managed 20 appearances across competition for La Viola in the past season due to several injury setbacks.
Blaszczykowski helped his country reach the quarterfinals at Euro 2016, having a hand in all three goals Poland scored in normal time throughout the tournament.