Chelsea lost 1-0 to Borussia Dortmund at the Signal Iduna Park on Wednesday night, courtesy of a sublime goal from Karim Adeyemi.

According to former Manchester United star Rio Ferdinand, Chelsea’s biggest problem is the club’s failure to sign a striker.

“I think he’ll [Potter] find some positives in there. He’ll be saying, ‘Slowly but surely we’ll get it right’,” Ferdinand said on BT Sport.

“They haven’t got a No.9 in this team. They spent all that money in the last two transfer windows and didn’t get an out-and-out No.9. That’s the problem.

“Long term, I think he’ll go and get that. They’re doing everything up to that point really, really well. The way the team’s been able to pass the ball through the lines and get into those really good areas.

“But again, they got undone by a clinical bit of finishing which they didn’t have in their own team.”