West Ham will take on Romanian side Astra Giurgiu in the last of their Europa League qualifiers on Thursday.
Turkish international winger Gokhan Tore is set for his European debut for the Hammers after being selected in the squad by Slaven Bilic.
The 24-year-old came on as first-half substitute for Andre Ayew in the 2-1 defeat against Chelsea in the opening Premier League game of the season.
Tore has made it past the Europa League group stages over the past two seasons for Besiktas – reaching the quarterfinals with Bilic in 2015 and the Round of 32 last season.
Bilic will however, be without record signing Ayew who is out for a few months with injury.
Fellow summer signings Nordtveit and Calleri will however, be available and have travelled to Romania.
West Ham provisional squad: Adrian, Randolph, Byram, Reid, Ogbonna, Collins, Oxford, Page, Antonio, Noble, Nordtveit, Kouyate, Obiang, Tore, Valencia, Quina, Fletcher, Carroll, Calleri.
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