Germany internationals Mesut Ozil and Ilkay Gundogan, both of Turkish origin, were accused by their national federation on Monday of having been "manipulated" after posing for photos with Turkey's President Recep Tayyip Erdogan.
"Football and the DFB (German football federation) defend values which are not fully taken into account by Mr Erdogan," DFB president Reinhard Grindel tweeted.
"That's why it's not good that international players allow themselves to be manipulated for his electoral campaign.
"In doing that, our players have certainly not helped the DFB's work on integration."
During a meeting Sunday with Erdogan, the two players, both born in the German city of Gelsenkirchen, handed over signed Arsenal and Manchester City shirts. Photos of the meeting were used on social media by Erdogan's campaign team.