Walcott has been dealing with a slight hamstring problem that saw him miss this past weekend’s victory over Sunderland.
Santi Cazorla and Nacho Monreal also missed the most recent training session as they continue to deal with health issues.
The Gunners dismantled Ludogorets 6-0 when the two clubs last met, and even playing on the road this week without Walcott and Cazorla they should have enough to come away with three points.
Promisingly, Goal.com notes that Walcott could be fit again in time for this weekend’s north London derby.
Walcott has been in terrific form recently, and a key part of Arsenal’s strong start to the season, so hopefully he gets healthy and back to his goal scoring ways soon.