Long was absent from the Republic of Ireland’s 2018 World Cup qualifier against Wales with a hip injury, but is available for Mauricio Pellegrino when his side entertain the Magpies.
Pellegrino also revealed there were no fresh injury concerns following the international break for the visit of Rafael Benitez’s side.
It means Matt Targett remains the Argentine’s only long-term absentee, but the boss may still look to shuffle his back, with his side yet to win at home this season.
Provisional squad: Forster, McCarthy, Stephens, Bertrand, McQueen, Soares, Pied, Yoshida, Hoedt, Van Dijk, Bednarek, Davis, Hojbjerg, Tadic, Romeu, Redmond, Ward-Prowse, Lemina, Long, Boufal, Austin, Gabbiadini.
Gareth Bale wants first-team football and will discuss his future with Real Madrid this summer, his agent has confirmed.
Real Sociedad have firmed up their interest in Newcastle midfielder Mikel Merino by reportedly making an opening offer of £10.5m.
Freiburg defender Caglar Soyuncu says he has turned down offers from Turkish clubs in the hope a move to Arsenal will be finalised.