Vinicius Junior felt his introduction alongside Marco Asensio turned Real Madrid's La Liga meeting with Real Valladolid in the champions' favour.
Brazilian Vinicius grabbed the only goal in Wednesday's 1-0 win after arriving from the bench in the 58th minute.
Madrid had dominated up to that stage, but Luka Jovic - the man Vinicius replaced - missed two big chances and had a third well saved by Roberto.
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With Jovic continuing to toil amid reports of interest from Manchester United, Zinedine Zidane turned to his bench and made a triple change, with Dani Carvajal joining Vinicius and Asensio.