Mierzejewski joined the Sky Blues in August on a three-year deal.

He has been a relevation for the A-League side, winning the Johnny Warren Medal and scoring 13 goals in just 24 appearances.

But on June 24 the 31-year-old tweeted: "Another week passed and I am even more dissapointed instead of being closer to solve situation. If someone is interested...on 9th of July I am in Sydney ready to tell whole true story. As an adults shouldn't we respect our promises?"

FourFourTwo understands the Polish international is not happy about aspects of his contract with Sydney FC that have allegedly not been honoured.

Mierzejewski declined to comment when contacted by FourFourTwo.