The 23-year-old is currently on loan at title chasing French club Nice.
But according to the Daily Star, scouts from Liverpool have watched Pereira on several occasions this season.
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Liverpool fans are not happy with the club's owners, FSG
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Liverpool fans are not happy with the club's owners FSG
The Portuguese international is comfortable in either full-back position.
Liverpool boss Jurgen Klopp lost confidence in Alberto Moreno which has led him to play James Milner at left-back.
However, Klopp wants to sign a permanent recognised defender in that position.
Ricardo Pereira has been scouted by Liverpool
The report says Pereira is valued at around £22million and Porto are open to selling him.
It is claimed Inter Milan are also interested in Pereira and are likely to submit their own offer for the player.
But Liverpool are understood to have made clear to Pereira’s representatives that they considering a move.