Karim Adeyemi scored a brilliant solo goal to condemn Chelsea to defeat in their Champions League last-16 first-leg tie at Borussia Dortmund.
The Premier League side rued missed chances as Joao Felix shot over from a good position and then hit the crossbar in the first half.
Defeat leaves Graham Potter’s side with the task of overturning the tie when the two sides meet at Stamford Bridge on 7 March.
The other champions round of 16 tie last night saw Benfica beat Club Bruges in Scott Parker’s Champions League debut as manager of the Belgian champions.
Parker, who took charge of Bruges in December, now faces an uphill task to guide his side into the quarter-finals, hoping for a better outing in the second leg of the last-16 tie takes place in Lisbon on March 7.