Duros won her first senior medal at the 1988 IAAF World Cross Country Championships. In an Annette Sergent-led team, she helped the French women to the bronze team medals through her eleventh-place finish in the women's long race. On the track she repeated her win at the national championships and gained selection for France at the 1988 Summer Olympics. However, her first Olympic appearance was not a successful one, as she failed to finish in the 3000 metres heats.