Zina Lynna Garrison (born November 16, 1963) is a former professional tennis player from the United States. During her career, she was a women's singles runner-up at Wimbledon in 1990, a three-time Grand Slam mixed doubles champion, and a women's doubles gold medalist and singles bronze medalist at the 1988 Olympic Games. She is currently coaching Taylor Townsend.
Zina Garrison represented the US at the Olympics.
While Zina Garrison is from the US, we don't know for sure that she represented the US when she medaled at the Olympics [sometimes athletes move to another country so they can represent it, for instance]. But, the algorithm assumed it.