Date of Birth: 
Place of Birth: Guane, Pinar del Río Province, Cuba
About Juan Hernández Sierra
- Juan Hernández Sierra (born March 16, 1969) is a retired boxer from Cuba, who competed in the welterweight (< 67 kg) division during the 1990s.
- He represented his native country at three consecutive Summer Olympics, starting in 1992 in Barcelona, Spain.
- After having won silver at his Olympic debut he repeated that feat in Atlanta, United States (1996). Four times he became world champion in his division, in 1991, 1993, 1995 and 1999.
Read more at Wikipedia