Men's Tennis
Tennis. The Fed Cup is equivalent to the men's Davis Cup.
Tennis - men's tennis.
Tennis is the sport associated with the Davis Cup.
tennis.
Tennis
Tennis
Given that the Davis Cup recognizes only countries, not people,and since there are no countries named "black" (or, at least, none currently assigned to play the Davis Cup),the answer is: there have been no black winners of the Davis Cup.
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Soccer
It is the sport of rugby. The Calcutta Cup is a rugby union trophy.
Brad Davis played for United States in the 2014 FIFA World Cup.
Rugby Union.......