Lens defender Kevin Danso was delighted with victory over Arsenal.
Lens deserved their Champions Leegue win after going behind to Gabriel Jesus' effort for the visitors.
Danso said: "We gave it our all today in front of our own fans.
"It was a difficult game. Arsenal had a lot of quality and made us sit back really deep, but we kept defending and kept our concentration. Luckily we won the game.
"The goal came from a mistake of our own, they didn't really create it, although it was a brilliant [finish] by Gabriel Jesus.
"We managed to get one back quickly and went on to win the game. It's a good result.
"At home we know how strong we are, in front of our fans. That's what we always try to do: win at home.
"I'm a bit gutted about the clean sheet, but we'll take the three points definitely."