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Club's security guard Hakan Yakinas, according to the lease agreement with the option to buy contract, moved to the Istanbul team.
The Swiss national team footballer of Turkish origin arrived in Istanbul on Wednesday and quickly agreed on the terms of a new contract and passed the medical examination to complete the transfer to the Turkish team.
The 27-year-old Yakinas, who shone in the 2002-2003 Champions League season playing for the club, moved from the Swiss team to "Stuttgart" last January, but failed to establish himself in Germany and has only played nine games in the Bundesliga so far, only one of them this season.