Millwall defender Christian Mbulu has reportedly been the subject of interest from scouts at Chelsea over recent weeks.
The 19-year-old is yet to feature in a senior fixture since he joined the Lions from non-league side Brentwood Town last summer.
Nevertheless, the Premier League West Londoners have been alerted by Mbulu's performances at Under-21 level, according to The Sun.
The youngster, who recently had a loan spell with Canvey Island, has been compared to Manchester United centre-back Chris Smalling.