Vickery, who joined the champions from Gold Coast Titans following a successful trial period, was forced off in the first half of the Rhinos' 36-6 opening night victory after injuring his ankle in a tackle. Scans have allayed fears that Vickery, who was deputising for Ben Jones-Bishop, suffered a break but the club have yet to put a timescale on his recovery.
Leeds coach Brian McDermott said: "I am pleased for Joe that it is not a fracture. The medical staff will work closely with him now to make sure he rehabilitates correctly and gets back out on the field as soon as he is 100%."
