Chelsea's Champions League hopes under threat after defeat at Dortmund

Chelsea suffered a 1-0 Champions League first-leg defeat at Borussia Dortmund as Karim Adeyemi’s superb second-half strike lifted the Bundesliga side to victory at Signal Iduna Park.

The Blues looked the stronger side for much of the match but failed to find the finishing touch, with Joao Felix coming closest when his first-half effort pinged off the crossbar.

Adeyemi’s moment of brilliance earned Dortmund victory in the 63rd minute, with Kalidou Koulibaly prevented from equalising when Emre Can cleared his effort off the line.

It is the first time since 2016 that Dortmund, who now have seven successive victories across all competitions, have beaten Premier League opposition in Europe.

“It was good. We dominated the first half. They had chances but we were in control for the majority of the first half,” Dortmund captain Jude Bellingham to BT Sport.

“In the second half we took the foot off the gas and they had more control. We showed how well we can defend and see out games.”

On Karim Adeyemi's goal, Bellingham added: “Just speed. We are really confident when he gets the ball one on one. Not many players can stop him. He had a tough time coming here at the start - finding his feet -a nd now he's flying.”

...LEGENDARY!!! pic.twitter.com/jdTpOlXZo0

Adeyemi's goal came during a period of sustained dominance from the visitors early in the second half, with the Germany forward pouncing on a clearance from a Chelsea corner.

Adeyemi sensed the opportunity and ran the length of the field, rounding both Enzo Fernandez and goalkeeper Kepa Arrizabalaga to give Dortmund the crucial lead.

While Chelsea manager Graham Potter may still be working on how to get his squad of expensive newcomers to work as a team, the visitors' individual