Kammala wannan jumla: A shekarar 1985 ta ci gaba da rike mukamai biyu na kasa da ta samu kuma ta fara tabbatar da kanta a tseren tseren ƙasa; Sergent ta lashe ta farko daga cikin taken tseren ƙasa guda bakwai na Faransa a wannan shekarar kuma ta kammala na goma sha bakwai a duka a gasar tseren ƙasa na shekara ta 1985.
1985 IAAF Gasar Cin Kofin Duniya. A watan Oktoba, ta ci nasara a kan hanyoyi a 10K Foulées de Suresnes. A gasar 1986 ta lashe lambar yabo ta farko ta kasa da kasa a tseren tsere mai tsawo, inda ta dauki lambar tagulla a cikin daidaikun mutane da kungiyoyi. Ta fara fitowa ta farko a nahiyar ta Faransa a gasar zakarun Turai ta 1986 a Stuttgart kuma duk da cewa an fitar da ita a zafin mita 1500, ta yi nasara ta takwas a wasan karshe na mata na mita 3000.