The 34-year-old former Scotland international, who has made eight appearances for the club this season, dropped Saka with a powerful kick to the calf in Monday night's Premier League clash at the Emirates.
Referee Mike Dean decided the tackle warranted a yellow card instead of an early bath - and Saka was replaced by Albert Sambi Lokonga before the second-half kicked off.
Saka had to be subbed off after this kick by James McArthur.
Only a yellow :flushed: pic.twitter.com/N2kevUuwYN
- ESPN FC (@ESPNFC) October 18, 2021
It was a decision that was questioned by many fans on social media.
That James McArthur foul (read: volley to the back of the calf) on Bukayo Saka was brutal. No surprise to see Saka taken off at half time. McArthur pretty lucky to still be on the pitch. #AFC 1-0 #CPFC #ARSCRY
- Joe Prince-Wright (@JPW_NBCSports) October 18, 2021
How is that not a red card on Saka?! :joy: have I missed something? McArthur is never getting anywhere near the ball! pic.twitter.com/NA6AY1hGMl
- Alex Apati (@LadsAlex) October 18, 2021
He's just kicked Saka clean through the leg and got away with just a yellow... bare in mind he should already have had a yellow... pic.twitter.com/CSQkGuR03V
- Max. ✍ (@AFCMax9) October 18, 2021
Despite a promising start, Mikel Arteta's side struggled to get out of the blocks in the second period and in the 50th minute, Palace equalised when Jordan Ayew found strike partner Christian Benteke.
#CPFC are level! :punch:
Partey loses the ball to Ayew who feeds Benteke through to cut in on his right and find the back of the net - game on!
:tv: Watch #ARSCRY live on Sky Sports PL pic.twitter.com/RpGs4nBcyj
- Sky Sports Premier League (@SkySportsPL) October 18, 2021
Summer signing Odsonne Edouard soon made it 2-1 in the 73rd minute - a goal that looked like an eventual winner on Patrick Vieira's return to his old club.
But Arsenal forward Alexandre Lacazette equalised in the dying embers of the game to snatch a point.