Frank Lampard confirmed Kalidou Koulibaly will miss Chelsea's next two games, including their Champions League return against Real Madrid, revealing he will out for 'weeks'.
Koulibaly limped off in the second half of Chelsea's first-leg defeat at the Bernabeu on Wednesday.
'He won't be available for either game. It's a hamstring injury and will be a matter of weeks, rather than days.'
Koulibaly was replaced by Marc Cucurella with Chelsea's most natural left-sided centre-back alternative Benoit Badiashile not registered for their Champions League squad.
Lampard also has Trevoh Chalobah available who did eventually come on in Spain after Chelsea went down to 10 men and reshuffled following Ben Chilwell's red card.