Lens overcame a first-half red card for defender Kyllian Antonio to battle to a 1-0 win over Paris St Germain in the Trophée des Champions at Stade Bollaert-Delelis.
Captain Florian Thauvin had given Lens, who won the Coupe de France for the first time last season, the lead against the run of play in the 32nd minute.
Antonio was then shown a straight red card after his late challenge on Maghnes Akliouche six minutes before the break.
European champions PSG – who lifted the Super Cup on Wednesday night after victory against Aston Vila in Salzburg – saw a late equalizer from Fabian Ruiz ruled out for offside before substitute Nuno Mendes was also sent off with four minutes left for lashing out at Michal Skoras.