See this is where the debate becomes really murky which I knew would happen i.e. black players are stronger, quicker etc whereas white players are more intelligent + skilful (hence Messi + CR7's recent domination) which I don't agree with either. Re Olympics, African countries tend to dominate the long distance events due to their wiry frames + stamina but are nowhere to be seen in strength events like weightlifting, hammer, javelin + discus etc.
Anyway, if you look at the most popular sports in the world besides football i.e. rugby, cricket, hockey, boxing, MMA and tennis, black athletes don't dominate a single sport besides basketball. However, they definitely hold their own in most of the aforementioned sports and have produced some of the greatest athletes to have ever lived but certainly don't dominate. In other words, they're not athletically superior.