Albert Streit says he wants to leave Schalke after losing patience at his lack of opportunities.
The 28-year-old midfielder had appeared to be on the verge of a call-up to the Germany squad when he joined Schalke from Eintracht Frankfurt in January.
However, he has had few chances to impress and is now looking to move on for a fresh challenge.
"I just don't know why Schalke signed me," Streit told Bild.
"They said they really wanted to have me and then they didn't give me a chance."
Streit is contracted to the Royal Blues until 2012, but he hopes to sit down to talks with team manager Andreas Muller soon to negotiate his release.
Reports suggest that a return to his former club Frankfurt could possibly be on the cards.
"I wouldn't say that was impossible if we have talks with Eintracht," he said.