The Senegalese forward scored a hat-trick for Besiktas in their last European encounter against Feyenoord, which has now inadvertently setup a clash against his former London rivals.
Last season, the Gunners also faced Turkish opposition at this stage and encountered no problems in dispatching Fenerbahce.
If Ba's last performance in the tournament is anything to go by, however, Arsenal will have to be on guard to stop the 29-year-old from getting on the scoresheet.
Feyenoord's defending, though, left a lot to be desired, with the Dutch side gifting Ba two of his goals with defensive errors.
With the likes of Per Mertesacker and Laurent Koscielny at the back, Arsene Wenger's side should fare better in that department.
Mertesacker is yet to feature in the Gunners' pre-season after being granted extra leave following his World Cup exploits in Brazil this summer.
The 29-year-old was part of the Germany squad that went all the way to secure the fourth world title in their history.
Could Ba hurt Arsenal's bid to get into the Champions League?