Champions League collapse is likely to set in motion sweeping changes after the club again fell short of its ultimate goal. For the fourth time in six seasons PSG crashed out in the last 16 of a competition they cherish most, finding more ways to lose a tie they dominated against the 13-time European champions Real Madrid. While less spectacular than the 2017 implosion against Barcelona at Camp Nou, Wednesday's meek disintegration from a position of strength underlined the enduring fragility of a squad scarred by repeated failures.