Premier League leaders Arsenal have to "reset" after losing to PSV Eindhoven and missing the chance to seal top spot in Europa League Group A, says boss Mikel Arteta.

The Gunners only needed a point in the Netherlands to advance to the last 16 next March.

But Joey Veerman's first-time finish from 16 yards and a header by substitute Luuk de Jong - after a mistake by keeper Aaron Ramsdale on his European debut - meant Arsenal lost in Europe for the first time this season.

"I'm very disappointed," added Arteta.

"We were nowhere near our level and we know that in Europe it's very difficult to win. I saw a number of the boys running out of energy because we had to chase the ball so much.

"It's the end of a long run where we won a lot of games and we have to reset."

PSV, managed by former Manchester United forward Ruud van Nistelrooy, also had three goals ruled out for offside as Arsenal were well beaten.