Earlier this month, he stated that the Bluebirds had made a serious offer to sign the 22-year-old midfielder during the winter transfer window.
Now, during an interview with TRT Spor, the 61-year-old businessman has suggested Yazici could fetch 20m euros this summer with Cardiff again the club's name he wants to attach to the transfer.
"The transfer value of Abdulkadir Omur and Yusuf Yazici together amounts to 30 to 40 million euros," he said.
"Cardiff City made an offer for Yusuf during the winter break. If we put a little more pressure here, the offer could rise to 20 million euros."