Chelsea boss Frank Lampard is a big fan of Leicester City fullback Ben Chilwell.
The Sun says he sees the England international, 22, as a long-term solution at left-back.
Manchester City looked at Chilwell in the summer but have kept faith with Oleksandr Zinchenko and Benjamin Mendy.
Now Chelsea have emerged as contenders for his signature, especially with Marcos Alonso considering his future.
Emerson is Lamps' other left-back option but Chilwell's pace is seen as an ideal long-term option.
The Blues' transfer ban means it will be next summer before they can sign players.
But a successful appeal could have them back in January's market.
