Manchester United, Liverpool, Chelsea and Manchester City target Kurt Zouma is now attracting interest from Atletico Madrid, Bayer Leverkusen and AS Monaco, reports talkSPORT.
The Saint-Etienne defender is one of the most in-demand teenagers in all of Europe at the moment, having attracted admiring glances from numerous clubs across the continent.
Inter Milan and Juventus are also believed to be monitoring the France U21 international's development in Ligue 1, with a view to joining the race to sign him when the transfer window reopens in January.
Red Devils boss David Moyes is understood to be keen to bring Zouma to Old Trafford, as he seeks a long-term replacement for the likes of Rio Ferdinand and Nemanja Vidic.
With both Manchester United centre-backs out of contract at the end of the season, the 18-year-old has been identified as a possible successor.
Jose Mourinho has a similar situation with regards to John Terry, who also has less than 12 months remaining on his current Stamford Bridge deal.
Chelsea are fortunate to have the likes of Gary Cahill, David Luiz and even Branislav Ivanovic who can play in the middle of defence, but they too will be expected to strengthen should the Blues skipper not be offered an extension.
Zouma is under contract at Stade Geoffroy-Guichard until 2017, but it's unlikely he'll see out that deal given the level of attention he is generating.
Liverpool manager Brendan Rodgers and Manchester City head coach Manuel Pellegrini are the Premier League's two most likely bosses to sign the player, but the Anfield and Etihad Stadium outfits face a serious fight to secure his signature at the turn of the year.