Graham Potter suffered his first Champions League defeat as Chelsea manager with Borussia Dortmund beating the Blues in their last-16 first leg at Signal Iduna Park. Prior to the defeat in Germany, Potter had gone five European games unbeaten winning three and drawing two, but Karim Adeyemi's goal has put Chelsea behind at half time in the tie with the second leg set for March 7.
Despite the hostile atmosphere the yellow wall provide for Dortmund, Chelsea had more than enough chances to win the game. Joao Felix went close twice in the first half with his second effort striking the bar before an in swinging corner caused Dortmund problems just after the hour mark, but no less than 30 seconds later the hosts were in front.
Adeyemi raced onto the eventual clearance from Dortmund and glided past Enzo Fernandez, who was the last man, before rounding Kepa Arrizabalaga to score. Kalidou Koulibaly was millimetres away from equalising in the final few minutes after his short squirmed beyond Gregor Kobel, but Emre Can was on hand to swipe the ball off the line.
