The former Barcelona coach also believes that the victory, which has opened up a five-point lead at the top of the Eredivisie table, has all but secured the title.
"They were set up to be offensively stronger and that boosted their chances of victory," he told De Telegraaf.
"I thought that was very positive to see. Ajax did not look at what the other team was doing, but played the game to win.
"The remaining four league games are therefore primarily a matter of being professional."
Ajax have four league matches remaining.