Crystal Palace and Swansea are among the clubs said to be tracking the highly-rated Millwall defender Christian Mbulu.
The 19-year-old only penned his first professional contract with the Lions in the summer and has yet to make his debut for the League One club.
Mbulu was on the bench for Millwall’s clash with Doncaster last month, and although he has yet to break into the first-team, he has still caught the eye of Premier League clubs.
Palace and Swansea are both said to be tracking the player, who has been compared to Manchester United’s Chris Smalling, while Chelsea and Watford have also been mentioned.
Millwall will be keen to keep him, while there have also been suggestions the player himself would be happy to stay and continue his development in League One rather than make the step up to the Premier League just yet.