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Chelsea 'really interested' in international star striker
CHELSEA are lining up a bid for Lokomotiv Moscow striker Oumar Niasse, according to reports in Italy.
Oumar Niasse has been linked with Chelsea and Tottenham
The Senegal international was linked with a move to Stamford Bridge last year, with Premier League rivals Tottenham also reportedly interested.
Turkish giants Galatasaray were said to be hot on his heels too, and newspaper Fanatik claimed Lokomotiv would be willing to sell for £4.4million.
The Belgian has not scored a single competitive goal this season and Costa is a shadow of his former self, netting just five times in the league.
Chelsea have also been linked with frontmen Antoine Griezmann and Alex Teixeira in the January transfer window.