The Argentine was surprisingly under-worked considering Arsenal's strangling possession. Save for a few nervy moments, he was generally a reliable pair of hands, and could do nothing to stop either Arteta's expertly dispatched penalty or Giroud's late header.
Palace's left side looked very significantly weaker than their right, with Gnabry and Sagna finding plenty of gaps to burst into. Struggled to contain the Arsenal surges and offered very little going forward.
Perhaps the most impressive of Palace's defensive unit, Gabbidon made a number of telling blocks, clearances and interceptions. Was commanding in the air and organised the rest of the backline well.
Looked the player most likely to undo Palace's hardwork, and twice came close to giving away a sloppy penalty. Never seemed entirely comfortable with the movement and speed of Arsenal's attack, especially the quick feet of Gnabry.
Did a good job of preventing Arsenal from breaching his flank, containing the unusually quiet Cazorla. Gibbs' adventurous overlaps caused him more problems though, but he was solid on the whole and spanked the crossbar with a powerful drive.
Did not offer Moxey enough support and gave Sagna far too much freedom down the flank. Offered little in an attacking sense, and seems to have lost much of his pace too. Replaced in the second half.
Typically tough-tackling in the hart of the midfield, he sat infront of Palace's centre-backs and did a good job of restraining the league leaders. One of many Palace players to give the ball away sloppily, though. Produced a fine save from Szczesny.
Helped clog the midfield, sitting deep and fighting fires. When he did win the ball, his loose passing often put his team-mates under unnecessary pressure and invited more Arsenal attacks. A real annoyance for the Gunners' midfielders though.
So busy and tenacious, scurrying around the pitch blocking passes and getting in the face of the Arsenal side. Presented with several good chances in the first half, but failed to even hit the target.
Handed just his second start since signing from Nottingham Forest, the Algerian played just behind Chamkah, linking play, driving forward, and pressing Arteta and Ramsey. His hard work was undone just a minute into the second half as he conceded an unnecessary penalty, though he remained keen to make amends.
After a quiet opening period, the former Arsenal man grew into the game and caused a lot of problems for the Gunners backline. Held up the ball well, threatened goal and burned Arteta as the Spaniard was sent off. If only he had brought his shooting boots.
In the end, Arsenal had the Poland international to thank for claiming all three points. Remained alert despite being a virtual spectator in the first half, and made a string of spectacular saves in the second period, doing brilliantly to deny Ward and Jedinak especially.
Provided so much purpose down the right flank, overlapping beyond Gnabry and firing crosses into the box. More worried by Bolasie in the second period, but always an excellent outlet for the Gunners.
Struggled to contain one-time team-mate Chamakh, with the Moroccan proving to be an excellent release for the Eagles. Switched off at times, put Szczesny under pressure with a lame back-pass and looked vulnerable.
As measured and controlled on the ball as ever, but, like Mertesacker, was worried by Chamakh. Also looked vulnerable to the driving runs of Guedioura.
Provided width and impetus down the flank, though not as penetrative as Sagna on the opposite wing. Not enough end product, especially when under pressure from Bannan, but defended resolutely.
Forced into a more withdrawn role following Flamini's early departure, but battled well. Harried and tussled with Palace's tenacious midfield and continued to bomb forward, eventually rewarded with an assist, clipping a lovely cross onto the head of Giroud.
The Spaniard is still returning from injury and struggled to influence the match in any meaningful way. Created little and was thwarted by the sheer volume of numbers Palace packed behind the ball. Replaced by Monreal.
Looked effortless at times, and his movement was an occasional worry for Palace's defence, but he did not show his usual vision and creativity as Arsenal struggled hugely to break down the south London side. Missed a great chance to wrap up the win.
It is games such as this, against a deep, defensive side, where Arteta's safe, sideways passing seems entirely unneeded. The Spaniard needed to be more adventurous, and his composure to net from he spot was cancelled out by his sending off. His dismissal gave Palace an enormous amount of momentum.
Hardly had a sniff, with Gabbidon dominating him in the air. Found his time and space limited and Arsenal really struggled to supply him. Aside from a few snatched chances, he was anonymous up until he nodded the second goal beyond Speroni.
Played well in his brief cameo, offering more solidity down the flank and also getting forward with real intent.
Replaced the injured Flamini early on and was on of Arsenal's livelier players, causing Moxey and the rest of the backline problems with his directness and pace. Won the penalty with an excellent piece of trickery inside the box.
Was brought on after Arteta was given his marching orders. Worked hard, as ever, and snapped at heels, and might even have extended Arsenal's lead.