Social media was quick to react to Petr Cech's debut performance following Arsenal's 2-0 defeat to West Ham United on Sunday.

Only last week, the former Chelsea goalkeeper was tipped as the Gunners' saviour ahead of the Premier League season following his showing in the Community Shield win over the Blues, but was at fault for both of the Hammers' goals at the Emirates Stadium which sparked some backlash on Twitter.

It's a harsh competition, the Premier League.

Double agent Cech is doing an outstanding job today #ARSWHUpic.twitter.com/cB6DUGfrpG
— Spurred On (@spurredontv) August 9, 2015

People who said the signing of Petr #Cech would see #Arsenal win the league. pic.twitter.com/y9ZKJRPg54
— Bleacher Report UK (@br_uk) August 9, 2015

You don't have this defense @PetrCech#CFC#cechpic.twitter.com/fy2xpfneTa
— عبدالسلام | CFC# (@abdosalam90) August 9, 2015

Jose, do you want #Cech back? https://t.co/2qaPGmiPuW
— mephobia (@mephobia8) August 9, 2015

Arsene Wenger trying to find the receipt for Petr Cech#AFC#CFC#WHUFCpic.twitter.com/PPWe3w3eb2
— GeoffPetersTalkSPORT (@mrgeoffpeters) August 9, 2015

The man himself is already looking to next week's game against Crystal Palace at Selhurst Park.

First game like this was not in the script - Mistake and no points but tomorrow is another day to get ready for the next game ! #COYG
— Petr Cech (@PetrCech) August 9, 2015