The 19-year old French forward has been on loan with La Paillade since January prompting some reports to suggest that perhaps the Rossoneri could sell him at the end of the season.
"As for Niang, we will have to see what happens with AC Milan because it would be too expensive to keep him, but if Rolland wants to keep him then we'll see," Nicollin told Midi Libre.
This has opened the door for both Arsenal and Tottenham who were showing significant interest in Niang, who had trials with the north London clubs, before he joined Milan in 2012.
The Gunners and Spurs are in the market for a new striker this summer and could quite possibly go after Niang according to reports.
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