Following the arrival of Pepe Reina during the 2018–19 season, manager Gennaro Gattuso announced that the two goalkeepers would share the role of starting goalkeeper across the club's competitions, with Donnarumma starting in Serie A, while Reina started in the Europa League. On 3 February 2019, Donnarumma was named man-of-the-match in Milan's 1–1 away draw with Roma in the 21st Round of the 2018–19 Serie A season, making five important saves. On 10 February, he made his 150th Milan appearance in a 3–0 home win over Cagliari in Serie A; as a result he became Milan's tenth-most capped keeper of all time, behind Christian Abbiati (380), Sebastiano Rossi (330), Dida (302), Lorenzo Buffon (300), Enrico Albertosi (233), Dario Compiani (221), Fabio Cudicini (183), Giovanni Rossetti (180), and Mario Zorzan (176).