Zidane wanted Mendy to come in to compete with Marcelo after a breakout season in Ligue 1, as the player made a total of 44 appearances across all competitions.
— Real Madrid C.F.⚽ (@realmadrid) June 12, 2019
Given that the 24-year-old is similar to the Brazilian in the sense that he is an attacking full-back, Real Madrid see him as a long-term replacement and someone who can also do a job in the short-term.
Mendy’s arrival means that some left-backs will have to leave, as Real Madrid already have Sergio Reguilon, Theo Hernandez and even Achraf Hakimi, who can play on that side.
Reguilon impressed at points in 2018/19 and Real Madrid would like to send him out on loan to further his development.