Chelsea boss Frank Lampard branded his team "very poor" in their 3-1 defeat at Arsenal.
Two first-half goals set the platform for the Gunners' first top-flight win since 1 November.
Alexandre Lacazette sent goalkeeper Edouard Mendy the wrong way from the penalty spot and Granit Xhaka curled in a superb free-kick 10 minutes later to put Arteta's side in control.
Bukayo Saka's cross then dropped into the top corner early in the second half to put the game beyond the visitors.
Tammy Abraham scored from close range to make it a nervy final five minutes for the hosts and Jorginho then saw his weak penalty saved by Bernd Leno.
But it was an otherwise lacklustre performance by Lampard's side, who missed the chance to go second.
Lampard told BBC Sport: "In the second half we showed some urgency but it was too late. The first half we gave ourselves too much to do, we were very poor. You can't lack energy and desire in the Premier League and we did.
"You can prepare as well as you want but if you turn up like that that's another thing. It's in the mind.
"If you perform below par things go against you like the Saka goal. That's life. On another day we could have scored the penalty and come back but it's not a day for us.
"The teams that win, win, win relentlessly weren't winning two or three years ago. We are not there yet, that's clear. I felt it when we are on our long unbeaten run and I feel it now. We got a lot wrong today."
