Arteta added to Match of the Day: "Credit to the opponent, they did really well and cause problems to any team. It's something we have to improve, conceding three goals (away) from home makes life difficult.

"The team showed spirit, quality, courage to go and go again. We never gave up and tried to the end.

"Big credit to the team, the way they go every three days is remarkable. Luton have been really unlucky with their results, they are well organised and they are a threat."

He also refused to be drawn on goalkeeper David Raya's mistakes, instead only saying: "It's part of the job, but I'm really happy with the team so let's move on."