1938-39 Friendlies
From TheChels.info - The Chelsea Football Club Wiki
I have only been able to trace that Chelsea played a solitary friendly, against Brentford, in the 1938/39 season. However they did play the traditional Pre-Season practise match.
Matches
1938-39 | Wed | 17 | Aug | 1938 | FR. | Blues v Reds | Home | 2-2 |
1938-39 | Sat | 20 | Aug | 1938 | FR. | Brentford | Away | Lost | 1-2 | Football League Jubilee Fund Match |