The Mirror's Football Spy reported Liverpool manager Jurgen Klopp requires a new full-back, "with James Milner not seen as a long-term solution."
The France international experienced a sensational campaign with his club as they claimed the Ligue 1 crown.
Monaco are expected to hold out for a £40 million fee for the former Olympique de Marseille star, per Benson.
Here is the left-back in action:
The 22-year-old—who can also play as a defensive midfielder—appeared 32 times for Monaco in Ligue 1 and the UEFA Champions League last season, providing eight assists, according to WhoScored.com.
In other Reds news, Klopp is back in the hunt for former target Piotr Zielinski of Napoli, according to reports from Naples.
Italian newspaper Il Mattino (h/t Football Spy) reported Liverpool have offered £25 million for the Poland international but that the Partenopei have slapped a £60 million price tag on the talent.
The former Empoli loan star's reputation has continued to swell since joining the Naples-based club last summer, and he appears ready for a jump into the Premier League.
The 23-year-old made 18 starts in Serie A last term, scoring five goals and assisting seven times, according to WhoScored.com. The player came off the bench a further 18 times to influence matches for his club.
Mendy and Zielinski are the type of high-quality players Klopp will want to add in the summer, boosting Liverpool's squad in key positions ahead of next term.
The Reds must also prioritise a centre-back on their shopping list as they appeared vulnerable in defence during the past 12 months, but Klopp has the seeds of an excellent side if he can stiffen the spine of his squad with talent.