Olympque Marseille striker Iliman Ndiaye is eyeing a return to England in January.
Ndiaye left Sheffield United for OM in August, but is open to returning to England next month on-loan.
So far, he has started only eight times in Ligue 1, having joined OM for 20m.
The Sun says the Blades are watching their former striker's situation, but will face competition should Ndiaye make the move.
Crystal Palace and Everton are also watching developments closely.