Chelsea are eyeing highly-rated West Ham defender Aaron Cresswell in case Filipe Luis leaves this summer, sources have told ESPN FC.
Luis has been linked with a move away from Stamford Bridge after failing to establish himself as a regular in Jose Mourinho's side since his arrival from Atletico Madrid for £15.8 million last summer.
The Brazil international has been forced to play second fiddle to Cesar Azpilicueta and Atletico are reportedly weighing up a move to bring him back to the Vicente Calderon.
Chelsea are drawing up a list of potential replacements should Luis leave and Cresswell figures highly on their wanted list after impressing in his first season in the Premier League.
Cresswell, 25, has been a revelation for West Ham since joining from Ipswich Town and his consistently high level of performances have seen him linked with an England call-up.
Manchester City are keeping tabs on Cresswell as they look to bolster their number of homegrown players quota for next season and now Chelsea have joined his list of suitors.
However, West Ham are keen to keep hold of the defender and are considering rewarding him for his progress with a new deal to try and fend off any potential move.