The club's president revealed to The Sun newspaper that talks are ongoing for the 25-year-old.
"We are in talks with Marin," Fikert Orman said. "We could sign him or go for a name we haven't been linked yet."
Ba also said: "Marin called me after my transfer to Besiktas. He told me they were also interested in him and said he would like to play alongside me.
"Chelsea are probably going to loan him out again, so this is something that could happen."
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