Stop him licking it, and clip the fur from the wound - hair irritates open wounds.
With the saluki grey heritage I would guess he is worrying the open wound.
Purple spray is often a good deterrent - iodine based - but so not a good look if you are going out
Muzzle if he is used to it - stop the obsessive cleaning that keeps the wound open.
Jab of anti Bio if it shows any signs of inflammation.