Arsenal slumped to a First Defeat of the season on Tuesday as Lens came from behind to win a pulsating Champions League clash 2-1 in France.
Gabriel Jesus opened the scoring in the 14th minutes to gave Arsenal an ideal start at raucous Stade Bollaert.
But Adrien Thomasson soon brought last season’s Ligue 1 runners-up back on level terms and the visitors saw Bukayo Saka limp off before half-time.
The 20-year-old striker, Wahi who became Lens’ club-record signing when he joined at the start of the campaign, then fired home in the 69th minute and his side held on for a famous victory.
The result lifts them above Arsenal to the top of Champions League Group B on four points, one above Mikel Arteta’s side.
The other game in the group on Tuesday saw PSV Eindhoven and Sevilla draw 2-2 in the Netherlands.