Defender Jerry Akaminako visited his former teammates at EskiÅŸehirspor and trained with them.
The centre-back used facilities at the Es Es gym and was joined by another former Black-Red player Berkay Dabanli.
Akaminko has been without a club since terminated his contract with Turkish second-tier side Istanbulspor.
He has struggled to stay afloat after recovering from a career-threatening injury in a pre-2014 FIFA World Cup friendly against the Netherlands.
The 31-year-old missed out on making Kwesi Appiah's final 23-man squad but regained his fitness and signed for EskiÅŸehirspor in the 2015/16 season.