Media reports claim that Chelsea are keeping tabs on Dean Henderson, who currently plays as a goalkeeper for Crystal Palace. The move is still in the early stages, but interest appears to be growing. Until a fee and conditions are finalised, the deal remains vulnerable to disruption - especially if Tottenham decide to make a formal offer of their own in the coming days. Defensively, Chelsea are sitting around the league average this season, at 1.36 goals conceded per game. Someone like Dean Henderson could keep them steady but also raise the level when it matters most. Crystal Palace continue to be linked with Othmane Maamma, Ladislav Krejci and Jadon Sancho while Chelsea are also rumoured to be tracking Maxime Esteve, Honest Ahanor and Alex Grimaldo. Can't get enough Chelsea transfer rumours? Follow @PlayerSwitchCom on Twitter for the latest transfer news as it happens.