Holloway has held talks with the Frenchman, who is available as a free agent after he was released by Tottenham.
The 36-year-old admitted to Holloway that he was only "50% fit", but the Eagles boss has not ruled out a move for the centre half if terms can be agreed.
"We met him on Wednesday. I don't know yet if we can do a deal," Holloway said.
"He was a very nice man and he admitted he's only 50 per cent fit which might be a problem. We're a long way off a deal with him but I met him. Whether we can ever come to a deal I do not know."
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