By Harry Davies Anthony Joshua and Francis Ngannou sized each other up for the first time head of their heavyweight showdown in March. Joshua will welcome former UFC champion Ngannou back into the ring after his stunning debut against Tyson Fury last October. Ngannou dropped the heavyweight champion and only lost by one point in a controversial decision as he looks to pick up his first boxing win against ‘AJ’, who is on a roll after winning three consecutive fights last year. The pair appeared at a launch press conference in London to promote their heavyweight crossover fight, which takes plac…