Serena and Venus Williams
2000 Sydney Games, 2004 Athens Games, 2008 Beijing Games, 2012 London Games
Medal count: Four golds each
The Williams sisters have owned Olympic tennis. Venus won the singles title in 2000 and the siblings won doubles that year. They repeated in 2008 and 2012, the same year Serena won her first individual title. They're tied for the most gold medals in Olympic tennis history.