Question: In which sport do Zimbabwean Byron Black and United States coach Rick Leach both hold professional status? 
Sentence (from "1993 US Open – Men's Doubles"): The Men's Doubles tournament at the 1993 US Open was held from August 30 to September 12, 1993, on the outdoor hard courts at the USTA National Tennis Center in New York City, United States.
Relevant evidence: No