Lorient were humbled by Avranches as the Coupe de France last-64 stage got under way on Saturday.
The Ligue 1 side lost 1-0 to their hosts from the semi-professional National league, with midfielder Maguette Diongue scoring the only goal after 59 minutes.
Avranches lost Ivorian defender Ali Keita to a late red card but clung to their lead.
Victory at the tiny Stade Rene Fenouillere was followed by a mass pitch invasion:
"@USAvranches_MSM: Fin du match victoire de l'USA face au@fclorient 1 a 0 !!!!!!!!! pic.twitter.com/8LZlrDUs8b" FÉLICITATION ! #TeamNormandie
- AS_SARCEAUX_ESPOIR (@AS_SARCEAUX) January 3, 2015
Lorient were not the only top-flight side to flounder at the first hurdle, with Nice joining them in bowing out as they slumped 2-0 against Ligue 2 side Valenciennes, who were relegated from the elite tier last May.
Adama Coulibaly headed Valenciennes ahead after 11 minutes, and Opa Nguette scored the second goal shortly before half-time.
In an all-Ligue 1 cup tussle, Bastia beat visitors Lille 2-0 with a pair of early goals from Floyd Ayite, who scored in the fifth and 24th minutes.
Nantes saw off Club Franciscain 4-0, with goals from Lucas Deaux, Valentin Rongier and Oswaldo Vizcarrondo, plus an own goal from Florian Narcissot.
Reims fended off Saint-Maur Lusitanos 3-1, as Diego, Gaetan Charbonnier and Nicolas De Preville fended off the possibility of an upset. Sitou Ayi had briefly brought Saint-Maur Lusitanos level early in the second half.
The introduction of Tunisian midfielder Fabien Camus triggered a 3-0 win for Evian against the amateurs of Bobigny, as he scored in the 66th minute, shortly after coming off the bench, to break the deadlock. Danish team-mates Nicki Bille Nielsen and Daniel Wass added later goals.
Among other matches not involving Ligue 1 sides, Tours beat Le Mans 3-1, Parisian outfit Red Star edged out Arles-Avignon 2-1, and a single goal earned Brest victory over Laval.