City stunned Real Madrid 2-1 in the Champions League, but the spotlight fell on youngster Nico O'Reilly. Capitalising on Thibaut Courtois' error, his goal shifted momentum before Erling Haaland's penalty sealed victory. Guardiola hailed City's resilience, underlining their squad depth as O'Reilly's breakthrough performance added a fresh dimension to the reigning champions' European campaign.