Arsene Wenger said “we all have to take responsibility” after Saturday’s 3-1 away defeat at West Brom.
It was a sixth loss on the beleaguered Wenger in his last nine games with the Gunners conceding twice from corners.
Alexis Sanchez’s 18th Premier League goal of the season had cancelled out Craig Dawson’s opener but the Gunners remain five points adrift of the top four with their hopes of Champions League qualification in the balance after Dawson headed in a second and Hal Robson-Kanu tapped in.
They also lost Petr Cech to injury and replacement David Ospina was at fault for Robson-Kanu’s goal after colliding with Hector Bellerin.
Off the pitch, Arsenal fans’ civil war continued as two planes with the opposing banners ‘In Arsene We Trust #respectaw’ and ‘No Contract #wengerout’ flew over The Hawthorns.
The manager, out of contract in the summer, remains a divisive figure and came under fire from the travelling fans who called for his exit, unfurled several ‘Wenger Out’ banners and criticised his late substitution of Sanchez.
Wenger said: “It’s a big disappointment when you lose a game like that. We all have to take responsibility and prepare for our next games.”
On his side’s set-piece defending, he added: “We work on the same system in every single game. Their deliveries are absolutely fantastic and their movement is good.
“We were guilty especially on the second goal but they score against anybody from set-pieces.”
Asked about Alexis Sanchez’s second-half substitution, he added: “We lost Sanchez. He stayed on but in the second half he was not himself. I decided to take him off and his ankle doesn’t look good.”