Liverpool had a scout posted to watch Benfica's clash with RB Leipzig on Tuesday night.
The two sides were in action for the Champions League Group G opener.
Record says the Reds, who were playing in Naples, had an official at the game which ended in 2-1 defeat for the Portuguese outfit.
Rumoured Liverpool target Timo Werner was the star of the show as he scored a brace which clinched victory for the Bundesliga side.