MADRID (Reuters) - Ajax Amsterdam captain Matthijs de Ligt is confident his side can go on to cause more Champions League mayhem after booking a surprise quarter-final place with a stunning upset victory over defending champions Real Madrid.

Four-times European champions Ajax overcame a 2-1 first-leg deficit, triumphing 4-1 at the Santiago Bernabeu in Tuesday's second leg to advance 5-3 on aggregate and send the Spanish giants crashing out.