Arteta put the Gunners ahead from the spot early in the second half after Adlene Guedioura’s reckless tackle on substitute Serge Gnabry.
But he was dismissed 20 minutes later after referee Chris Foy deemed his foul on Marouane Chamakh had denied the former Arsenal striker a goal-scoring opportunity. The Gunners will not appeal the suspension, which will rule him out of League Cup action against Chelsea.
Palace threw everything at the Gunners but were denied by a string of fantastic saves from Wojciech Szczesny. And with time running out Arsenal finished the Eagles off as Aaron Ramsey picked out Olivier Giroud, who buried his header to seal the three points.
Arsenal stay top of the Premier League for another weekend, while Palace are second bottom and could drop further if Sunderland beat Newcastle on Sunday.
But the Gunners will be without Arteta for the Carling Cup match against Chelsea, and could miss Mathieu Flamini for several matches after he went off with a groin problem.
Pre-match – Palace mix it up, Arsenal name strong XI: Five changes in midfield and attack for managerless Palace, while Arsenal field their strongest XI given Jack Wilshere and Tomas Rosicky’s questionably fitness.
34’ – CHANCE: Santi Cazorla drills a superb effort just wide after taking Dean Moxey out with a superb turn.
38’ – SAVE: Julian Speroni with an excellent stop to deny Aaron Ramsey.
41’ – MISS: Chamakh leaps far too early, thus totally missing the ball for what would have been a free header.
46’ – PENALTY: Terrible tackle by Guedioura on Gnabry at the start of the second half.
47’ – GOAL: Palace 0-1 Arsenal. Arteta rams the penalty home. Speroni went the right way but had no chance.
66’ – RED CARD: Arteta clashes with Chamakh and is controversially sent off for denying a clear goalscoring opportunity despite only just being in his own half.
73+74’ – Szczesny makes two fantastic saves, first from Joel Ward and then from Mile Jedinak, as Palace pile it on.
87’ – GOAL: Palace 0-2 Arsenal. Giroud, who didn’t have his best game, gets it right with a bullet header from a great Ramsey cross
At one point in the first half Arsenal had completed 111 out of 117 passes while Palace were on 10 of 17.
Palace have now lost six Premier League matches in a row.
Arsenal are unbeaten in 14 competitive away games, winning 12 and drawing twice.
TALKING POINT – Was Foy right to send Arteta off? The Spaniard brought down Chamakh on halfway, but he was the last defender and there was a Palace player free in the middle too. In one way it was not a clear goal-scoring opportunity due to the distance Chamakh was from goal, but on the other hand Arsenal would have been unlikely to get men back. Ultimately Arsenal’s only concern is that Arteta will miss the match against Liverpool, although they have options in midfield.
MAN OF THE MATCH
Crystal Palace: Speroni 6, Ward 6, Delaney 7, Gabbidon 6, Moxey 6, Jedinak 7, Dikgacoi 5, Bannan 6, Thomas 6, Guedioura 5, Chamakh 6; Subs: Kebe 6, Bolasie 7, Gayle 6
Arsenal: Szczesny 8, Sagna 7, Mertesacker 6, Koscielny 6, Gibbs 6, Arteta 6, Flamini 6, Ramsey 7, Ozil 6, Cazorla 6, Giroud 6; Subs: Monreal 6, Wilshere 6, Gnabry 7
MATCH IN A TWEET