Benfica made it three straight wins under Bruno Lage after recording a routine 3-0 win against Boavista.
The Eagles went ahead in the 11th minute when Kerem Aktürkoğlu’s cross was converted by Vangelis Pavlidis.
Another Turk was involved as Benfica doubled their advantage in the 31st minute, a low drive from Orkun Kökçü skidding past 17-year-old goalkeeper Tomé Sousa.
The second half onslaught failed to eventuate at Estádio do Bessa Século XXI due to Benfica’s wastefulness and Boavista’s hustling defence.
Arthur Cabral replaced Pavlidis late on, the Brazilian striker bamboozling an exhausted Bruno Onyemaechi and netting the third in added time.
Benfica now return to Estádio da Luz where they host Gil Vicente ahead of a Champions League clash against Atletico Madrid.