Chelsea head coach Enzo Maresca insisted “nothing has changed” for his young side after they turned in a devastating display to sweep aside 10-man Barcelona 3-0 at Stamford Bridge.Victory ensured direct progression to the Champions League last 16 remains in the Blues’ hands but it was the manner of the win – a pulsating, courageous display full of bite, fluency in attack and an irresistible will to recover the ball – that felt like the most significant outcome of a memorable night.Teenage winger Estevao cemented further his growing reputation by eclipsing fellow 18-year-old Lamine Yamal, who contributed little.