Przemyslaw Kazmierczak has accused boss Nigel Clough of discrimination and says he has no intention of remaining at Derby.
The Polish midfielder’s priority is to return to his parent club, Porto, after losing his place in The Rams’ starting line-up in January.
The 27-year-old fell out of favour at Pride Park after the arrival of Nigel Clough from Burton Albion, and he has attacked the manager by saying he does not like foreign players.
“I would love to return to Porto,” he told Mais Futebol.
“I was contacted by a director a few weeks ago and he asked me how I was, but right now we have to talk.
“I had been told that this manager did not like foreigners and it seems to be the truth. I have made up my mind - I want to leave. It is all over. I am leaving Derby County.
“I have no idea whether there is a place for me at Porto or not, that is why I must make it clear at the end of the month, but right now I dream of returning.”