Explained: Why Kai Havertz was allowed to retake key penaltyChelsea forward Kai Havertz was controversially allowed to retake his second-half penalty against Borussia Dortmund - and converted to take the lead.
James gives Chelsea huge Champions League injury boostReece James has handed Chelsea a timely fitness boost, with the England defender returning to training ahead of a meeting with Borussia Dortmund.