The 22-year-old is understood to be nursing a minor injury and Northern Ireland boss Michael O’Neill will be anxiously awaiting positive news ahead of the World Cup qualifiers in September.
Bradley has not been involved in first-team training, ruling him out of the start of Liverpool’s title defence.
The former Dungannon United Youth ace missed his side’s friendly against Athletic Club and the Community Shield loss to Crystal Palace.
There was no update on his fitness from manager Arne Slot in his pre-match press conference.