Two goals in the final seven minutes from Aaron Ramsey and Olivier Giroud helped the Gunners come from 3-2 down to snatch a late win over the 2016 champions.
Shinji Okazaki had equalised on five minutes following Alexandre Lacazette's second-minute opener, and Arsenal fans were not pleased with Petr Cech's involvement in the build-up to the equaliser.
The 35-year-old came off his line and failed to collect a cross as Okazaki headed into an empty net after beating Xhaka in the air, and fans of the North London club were furious with the Czech international.
Cech is asleep— Moxy Toxy James (@moxyladejames) August 11, 2017
BIN CECH— Matt Sloan (@Sloan_12) August 11, 2017
Why didn't cech stay in goal— Emma (@cashtonxbutler) August 11, 2017
Cech out— Mr.Beave (@dave_gakuru) August 11, 2017
Release Cech— Mfana kaMashila (@Siyanda_Nino) August 11, 2017
Cech every season 1st day shocking— Nath Dill (@nathdillonn) August 11, 2017
Another opening day Cech disasterclass— ㅤㅤㅤCal~ (@ApocalypseAfc) August 11, 2017
Worryingly for Arsenal, Arsene Wenger has sold Wojciech Szczesny and loaned out Emi Martinez, meaning that David Ospina, who is rumoured to want a move away from the club this summer, is Cech's only competition.
The former Chelsea star, who joined the Gunners in 2014, is a fine goalkeeper on his day but he seems to be becoming more of a liability with each season that passes.