Celtic's new signing, Sebastian Tounekti, has only three international caps to his name.
Tounekti was called up for Tunisia's World Cup qualifier against São Tomé and Príncipe but was left out of the main squad due to injury.
The simple answer to all of this is that Tounekti’s injured.
Celtic have significant games coming up after the October international break, and Tounekti is expected to play a crucial role.
Tunisia secured a 6-0 win against São Tomé and Príncipe without Tounekti.
Tounekti's injury keeps him from Tunisia's squad, benefiting Celtic ahead of key games.