The Sun says the Magpies reportedly made an offer of £25million for the striker last month but were rebuffed by the Ligue 1 club.
And now world champions Chelsea are said to be considering a move for the 19-year-old when the transfer window reopens.
The Blues are apparently ready to cough up the £33m needed to land his signature and could offer the lure of Champions League next season - something beyond the relegation-threatened Toon.
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