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UFC PI director of physical therapy discusses working with heavyweight champion Francis Ngannou's knee injury ahead of UFC 270.      Related StoriesUFC PI's Heather Linden details rehabbing Francis Ngannou through serious injury - EnclosureMichael Chandler thinks Alexander Volkanovski 'might actually squeak out a decision' vs. Islam MakhachevRobert Whittaker says 'notorious troll' Paulo Costa will surely make their fight at UFC 284