Lille is top of the French league after beating northern rival Lens 4-0 to move two points above defending champion PSG.
The victory comes a week after they beat Saint-Etienne 1-0 in the French Cup final, the first competitive match on French soil since the coronavirus shutdown.
Nantes were third after 10 games and stayed in the top five well into the second half but a plunge in form has dropped them to 10th.
Apart from a freak loss to promoted Strasbourg this month, the super-rich star-studded team has been nearly flawless, amassing 50 points in 19 games.
Clubs in the top two divisions in France spent a record 697 million euros in the close season, the French league announced.
According to LFP, this year's total amount of purchases were four times the amount of 2016 - reaching a total of $830mns of investment.