Premier League champions Leicester City are aiming to prolong their fairytale as they head into this week's Champions League quarter-finals, but they are heavy underdogs against an in-form Atletico Madrid team who have reached the final twice in the past three years.
Here BBC Sport explains exactly what the Foxes must do to defy the odds once again.
Match Atletico's motivation
It has regularly been suggested that Leicester have focused on the Champions League at the expense of their Premier League campaign, but they will be hard pushed to match the motivation of an Atletico team who have more reason than anyone to chase success on the European stage.