Celtic have included Moses Odubajo in their squad for the three match trip to Austria.
The right-back hasn’t played a game in the last two seasons with his Hull City contract expiring at the weekend.
Brendan Rodgers is currently without Mikael Lustig, Cristian Gamboa and Dedryck Boyata due to World Cup commitments and could offer Odubajo a short term deal if he impresses and proves his fitness.
The 24-year-old was a £1m signing for Hull in August 2015 after spending a season with Brentford.
Odubajo played in 53 matches during Hull’s promotion season but has been out of action since playing in the Play-Off win over Sheffield Wednesday at Wembley.
Despite suffering three knee injuries Hull did offer the 24-year-old a new contract which he rejected.
Anthony Ralston is the only right-back with the Celtic squad in Austria although Stephen Welsh, mainly a central defender, can also play in that position.