According to Daily Mail, Chelsea are in competition with Premier League rivals Manchester City and Manchester United over a deal for Metz star Pape Matar Sarr.
The 18 year old all-action midfielder is regarded as one of the brightest young talents in France.
Sarr burst onto the scene last season with Metz, and after just one reserve team game was promoted to the senior side in November and quickly made himself a first team regular.
He made 22 appearances in Ligue 1 last season for Metz, scoring three times.
The Blues see Sarr as a potential star and are preparing a move for the 18 year old midfielder.
The Blues are prepared to buy Sarr and loan him back to Metz for the season in a bid to entice the Ligue 1 club to do business before the close of the transfer window.
Sarr signed a five year deal with Metz last September and can play anywhere across midfield.