Martinez is approaching a return from the knee injury he suffered in early February but is not yet back in full training with the rest of the squad.
Mazraoui hasn’t played since the 2-1 home victory over Chelsea in September.
He was selected for international duty with Morocco but did not feature in wins over Bahrain and Congo for the World Cup-bound Atlas Lions.
Aside from the defensive pair, Amorim should have a strong squad to pick from at Anfield, although caution will be taken around those who embarked on longer trips, such as Casemiro and Matheus Cunha, who were in the Far East with Brazil.