Casemiro pinpointed a drop in intensity as the reason for Real Madrid's 2-1 Champions League loss to Manchester City – but remains confident they can still overturn the first-leg deficit.
Madrid appeared on course to take an advantage to the Etihad Stadium when Isco put them ahead on the hour mark at the Santiago Bernabeu on Wednesday.
However, Gabriel Jesus' header levelled matters for City before Kevin De Bruyne completed the turnaround from the penalty spot.
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Sergio Ramos was sent off four minutes from the end of normal time, meaning Madrid will be without their captain for a return leg on March 17 in which they will need to score at least twice to progress.