Chelsea are reportedly showing interest in Brighton centre-back Lewis Dunk, who is also a target for Arsenal.
Reports last week revealed Arsenal had sent scouts to watch the 19-year-old, who has impressed for the nPower Championship side since coming through the ranks as a youngster.
But according to Metro, Chelsea boss Andre Villas-Boas is keeping tabs on the teenager, who could be available for around £5million.
Arsenal scouts were in attendance last week to watch Dunk in Carling Cup action against Liverpool, although the youngster was an unused substitute in the 2-1 defeat to Liverpool.
According to Monday's report, Fulham also had staff at the game.