Arsenal
Petr Cech - 6/10
Couldn't do much for Palace's opener and their second but the Cech from a few years ago could've saved both.
Laurent Koscielny - 7/10
Put in a good performance with Arsenal shifting back to a back-three but should've done better to prevent Townsend's effort in the second half.
Shkodran Mustafi - 8/10
Commanded the defence really well from the centre and took his goal like a seasoned forward. Top class performance from the German tonight.
Calum Chambers - 7.5/10
Did well to keep the tricky Zaha grounded and it's nice to see him back in the first-team. He's one for the future and performances like this will help him.
Sead Kolasinac - 7/10
Such an impressive player when he runs down on the left but didn't contribute as much to his attack as he normally would.
Jack Wilshere - 8/10
Showing glimpses of that magic and burst he can toy around with a 93% passing accuracy and his assist for Alexis Sanchez's second was a thing of beauty. Glad to have him back. (Touch wood)
Granit Xhaka - 6.5/10
Not the best of nights for the Swiss international but his 90% passing accuracy is commendable.
Hector Bellerin - 7/10
Spent most of the game in the opposing half and should've scored from a shot on target. Getting back to his best.
Alexis Sanchez - 9.5/10
Two incredibly delightful finishes from the Chilean today and he stayed on the field to thank the fans. Don't read too much into it though.
Mesut Ozil - 7.5/10
Missed two big chances in the game to finish it off for Arsenal but his timing of the runs and the weight of his passes are just luxurious.
Alexander Lacazette - 7.5/10
Was unhappy when taken off in the game and ran and ran and ran all night long looking for the pass. Weirdly, we saw the same run from Sanchez once and Wilshere found him. Don't read too much into that too.
Substitutes
Francis Coquelin - 6.5/10
Came to shore up Arsenal's midfield and did some of it. Didn't quite get into the game given the limited time.
Ainsley Maitland-Niles - 6.5/10
Had a good run down the left flank but again, was on the field for too short a period of time to merit a higher rating.