Coelho Neto represented Brazil at the 2008 Summer Olympics in Beijing. She competed at the 4x100 metres relay together with Lucimar de Moura, Thaissa Presti and Rosangela Santos. In their first round heat they placed third behind Belgium and Great Britain, but in front of Nigeria.
Their time of 43.38 seconds was the fifth time overall out of sixteen participating nations.
With this result they qualified for the final in which they sprinted to a time of 43.14 seconds and the fourth place behind Nigeria, missing out on the bronze medal with 0.10 seconds.