Dusan Tadic scored the opening goal of the game when he fired Ajax in front within the first 20 minutes.
The Dutch are one of only three teams to go through the first round by winning all their games the other two being and Bayern Munich.
The Dutch have also scored in each of their six Champions League games so far with a 100% winning record away and home.
Prior to that, As Aguias claimed a 3-1 victory at Tondela to end their two-game losing streak on February 7, before seeing off Santa Clara 2-1 five days later.
Jurrien Timber could miss out on this game after hitting his calf on a goal post at the weekend.
A reboot is needed after the second 45 minutes of last Friday's draw at Boavista, a game in which they were great until half-time and then were lucky not to lose in the second period.
The winner will be decided by the aggregate score of two legs.
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