Ajax responded to PSV Eindhoven's statement of intent with a 3-1 victory at AZ Alkmaar in the Eredivisie.
Ajax began their Eredivisie title defence with victory over Vitesse, as Groningen, PSV Eindhoven and Feyenoord also won.
Aston Villa slumped to a 4-1 defeat away to Dutch side Groningen after conceding two goals in the opening eight minutes.
Aberdeen progressed to the third qualifying round of the Europa League with a 2-1 victory over FC Groningen.
AZ Alkmaar will take a big lead into their Europa League play-off semi-final second leg after a 3-0 win over Heerenveen.
Real Madrid's Super Cup clash with Sevilla starts a stunning season of live European football on Sky Sports 5.
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