Both Sanchez and Giroud started the Premier League encounter at The Hawthorns and both played for the entire 90 minutes.
Chile international forward took one shot, had a pass accuracy of 78%, created one chance, put in three crosses, attempted two dribbles, and made two blocks.
France international striker Giroud took five shots, had a pass accuracy of 47%, put in one cross, attempted one dribble, and made one clearance and two blocks.
The former Montpellier star also gave the Gunners the lead just before the half-hour mark, but West Brom staged a comeback to register a 2-1 win.
Following the defeat, Arsenal fans took to Twitter to have their say on the performance of Giroud and Sanchez against the Baggies.
Below are some of the best comments:
Arsenal fans on Olivier Giroud:
It's lack of quality, esp. in front of goal. Giroud getting back to being his old static self. Alexis jaded. And Joel Campbell! #afc— Adi Meiri (@MeiriAdi) November 21, 2015
arsenal will never win the league under wenger its now 12 seasons and he still is no closer + giroud as the no.1 striker for 4 years #AFC— s.uzo (@suzo92) November 21, 2015
Arsenal fans on Alexis Sanchez:
I thought Özil, Giroud, and Sanchez all looked pretty decent today but I feel we're missing Rambo. #AFC— Daniel Hill (@danhill11) November 21, 2015
I feel sorry for Sanchez in that game, he played really well. We'll bounce back #AFC— James Perry (@JPerryComposer) November 21, 2015