With Thiago Alcantara the latest player to be ruled out due to a suspected positive COVID-19 test and Jordan Henderson absent due to illness, the 19-year-old begins in midfield.
Morton is one of three changes made by the Reds in London, with the others seeing Naby Keita and James Milner come into the side.
Liverpool: Alisson, Alexander-Arnold, Matip, Konate, Robertson, Morton, Milner, Keita, Mane, Salah, Jota.
Subs: Kelleher, Firmino, Gomez, Oxlade-Chamberlain, Minamino, Tsimikas, Gordon, Williams, Quansah.