French Champions Paris St Germain were beaten by a lone goal by newcomers Lens as they recorded their first Ligue 1 victory in five years.
Goalkeeper Marcin Bulka attempted to play the ball out from the back but was robbed on the way by Cameroonian forward Ignatius Gango who fired to the top corner to give his side the eventual winner.
The Parisians suffered a blow after losing several senior players for testing positive for Coronavirus.
The defending champions were able to field only four of their champions league starters.
World-record signing Neymar and French star Kylian Mbappe were missing as both are on quarantine as they test positive for COVID-19.
PSG play Marseille next Sunday as they seek to return to winning ways.