The striker was on the receiving end of a heavy challenge from Sander Berge during Arsenal’s 2-1 victory over Sheffield United last Sunday.
Aubameyang hobbled away from the tackle but managed to complete the match as goals from Bukayo Saka and Nicolas Pepe sealed the win for Mikel Arteta’s side.
Aubameyang had been called up for Gabon’s national side ahead of their match against Benin on Sunday.
But the 31-year-old has withdrawn from the squad and will not take part in the game.
‘Aubameyang suffers from a small sprained ankle, contracted on Sunday, during the Premier League match against Sheffield United,’ said Gabon coach Patrice Neveu.
‘The Arsenal doctor sent me a certificate indicating his unavailability. He is in care for a week.’
Aubameyang could now be a doubt for Arsenal’s next Premier League fixture against Manchester City on October 17.
The left-back was identified as a person who had come into close contact with Scotland teammate Stuart Armstrong, who has tested positive for coronavirus during the international break.
However, Arsenal insist that Tierney has not broken any Covid-19 protocols.
‘Our medical team have confirmed that Kieran was socially distant at all times from the player who tested positive and has broken no rules regarding Covid-19 protocols,’ read a statement from the Gunners.
‘We are currently seeking further advice and clarification of the details.’