Chelsea currently have Marcos Alonso and Emerson Palmieri available as left-back options, while Cesar Azpilicueta also has the ability to deputise there for Lampard.
Palmieri is almost certain to be sold, with Juventus and Inter Milan keen on his signature, while the latter are also supposedly vying with Sevilla for Alonso.
If Chilwell proves too expensive, Chelsea do have several other options available this summer with Nicolas Tagliafico and Alex Telles expected to be more affordable.
Robin Gosens is also a cheaper alternative while Marc Cucurella is another young star who has been linked with a move to Stamford Bridge.
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