Former Chelsea defender Slobodan Rajkovic remains available as a free agent.
The 26 year-old Serbia international was sold by Chelsea to Hamburg SV in 2011 for €2 million.
After four years with HSV, Rajkovic's deal was not renewed at the end of last season.
The defender is now seeking a new club.
While with Chelsea, Rajkovic spent time on-loan with Dutch partners Vitesse Arnhem.