Esther Julia "Daysi" Duporty Torres (born February 9, 1971, in Guantánamo) is a retired sprinter from Cuba, who competed at three consecutive Summer Olympics, starting in 1992.

Duporty had success as a young athlete at the Central American and Caribbean Junior Championships, where she was runner-up in the women's 200 m behind Revoli Campbell in 1990.

She reached the semi-finals of the 200 m and she was sixth in the 4 × 100 metres relay, forming part of a team with Pan American champion Liliana Allen.

She stepped up a distance at the 1993 Central American and Caribbean Games, winning the gold medal over 400 metres as well as the 400 m relay title with Cuba.

[6] Duporty won the Cuban title over 400 m on five separate occasions between 1994 and 2000 – a streak interrupted only by Ana Fidelia Quirot in 1996 and Zulia Calatayud in 1999.