Our next match at Tottenham will be our 12th against a side managed by Jose Mourinho, but what do you remember about our previous meetings with the former Blues boss?
Whatever your feelings about Mourinho, his career has been intertwined with Chelsea since he first arrived at Stamford Bridge in 2004, whether as our outspoken manager or as a high-profile opponent. It is the second of those we are testing your knowledge of today.
We travel across London to face his Tottenham side in the Carabao Cup fourth round on Tuesday evening and there is bound to be plenty of attention on the dugouts again as Frank Lampard leads Chelsea against his former manager for the third time, following our two wins over Spurs last season.
Those two victories took our total number of matches against Mourinho teams to 11. Can you remember them all? Find out in the quiz below.
If you fancy using that Chelsea knowledge to try to win some fantastic prizes while competing against your fellow Blues fans, don't forget to enter the Play Predictor for Tuesday's match.