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Since Ashley Cole left Chelsea in 2014, the Blues have not been able to get a worthy replacement.
Former Chelsea manager Jose Mourinho opted to use Chelsea right-back Cesar Azpilicueta as a left-back, until the Blues signed Marcos Alonso under Antonio Conte.
Alonso impressed as a left wing-back but struggled to impress defensively as a left-back.
With the signing of Ben Chilwell, former Chelsea winger Pat Nevin, has hailed the 23-year-old, and believes he can last at the top for the next 7 to 10 years.
Nevin said: “There is the possibility of a good seven to ten years of service ahead at Stamford Bridge for our latest signing.
“I am delighted Ben Chilwell is now finally here but probably not as delighted as Olivier Giroud, Tammy Abraham and of course Timo Werner, who have all had their scoring chances noticeably increased by his arrival.
“Chelsea fans the world over can now doubtless see what Frank’s signing strategy is and the club’s willingness to back him.
“There may be no one in the stadium but the buzz is still palpable. These are exciting times to be a Blue.”