Pascal Dupraz’s side were found wanting defensively as the Canaries recorded a home victory.
Evian Thonon Gaillard find themselves slipping closer and closer towards the relegation zone in Ligue 1. The Savoie club have been wholly unable to build on three back-to-back wins earlier in the month and have now lost two in a row.
Defeat to mid-table Nantes leaves them only three points clear of 18th-place Toulouse, while a 2-1 victory sees Nantes move up to eighth-a clear ten points between they and the relegation zone.
Franco-Cameroonian forward Georges-Kevin N’Koudou opened the scoring on the stroke of half-time with a close-range finish.
Evian had barely composed themselves after the break when Togo attacker Serge Gakpe made it two after demonstrating fine poise.
L’ETG struggled to guard their composure in defence, with both Dany Nounkeu and Jonathan Mensah guilty of some particularly physical tackling.
Clarck Nsikulu halved the deficit with a late finish, but it was too little, too late for Dupraz’s side.