Rousselot is resigned to seeing the defender move to LaLiga this month.
"We must find a solution which everyone is happy with. We have set a time limit to - until the 31st of January but I don't know whether that will be of any help to Sevilla because they want the player right now," he said.
Sevilla chief Monchi is driving the deal.
Sevilla are keen to conclude the operation as soon as possible as a replacement for Timothée Kolodziejczak who is looking to move on.
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