Olympique Marseille 1-1 Chelsea (1936-37 Friendlies)
From TheChels.info - The Chelsea Football Club Wiki
|  30 May 1937  | OLYMPIQUE MARSEILLE | 1 – 1 aet. | CHELSEA |  Venue: Antibes   Attendance: Referee:  | 
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| 	 Ignace    |     Bambrick    | 
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Notes
Being part of a tournament, there had to be a winner and Chelsea won on the spin of a coin after 30 minutes extra time. 
 The substitute for Olympique Marseille appears to have played, but it is not known who he replaced.