Anna Kournikova in a Sports Illustrated swimsuit shot

Tennis pro Anna Kournikova poses on the beach in Puerto Rico in her first Sports Illustrated swimsuit photo spread in 2004. The image is taken from a TV show titled "The Sports Illustrated Swimsuit Edition 40th Anniversary Special," which aired on Spike TV. Anna Kournikova was born in 1981, so she turned 23 the year this photo was taken.