Chelsea will need to come from behind in the second leg of their Champions League last-16 tie with Borussia Dortmund after the German side secured a 1-0 win in the first leg at Westfalenstadion. Graham Potter's side had their chances, but could not convert and were caught on the counter-attack. Karim Adeyemi's wonder goal, in which he streaked the length of the pitch, proved the difference.