During the closing minutes of Wednesday's Champions League fixture with Dinamo Zagreb, the left wing-back pulled up sharply and immediately went down on the touchline.
The 25-year-old needed to be helped back down the tunnel, and it soon became apparent that the player was a major doubt for the upcoming tournament in Qatar.
Chelsea head coach Graham Potter revealed at a press conference on Friday that Chilwell was due to undergo a scan on the injury, saying that there had been a slight delay in order for the initial swelling to go down.
However, as expected, Chelsea have now confirmed that Chilwell will spend a lengthy period on the sidelines