Crestfallen Arsenal boss Arsene Wenger admitted his side had been poor and did not deserve anything after they suffered a 3-2 defeat to West Brom.
Three second-half goals from Peter Odemwingie, Gonzalo Jara and former Arsenal player Jerome Thomas put Albion in dreamland before Samir Nasri scored two late consolation goals for the home side.
"We were poor and we got a poor result," said Wenger. "We were poor everywhere, at the back, up front and in the middle of the park."
The result left Arsenal four points adrift of Barclays Premier League leaders Chelsea while West Brom moved into fifth place.
Wenger continued: "We had an off day and were not good enough to win the game. I believe the concentration that gives you the sharpness was not there.
"We made it more difficult because we were not at our usual level, defensively or offensively. Anything was difficult for us today, to pass the ball, to win it back. Overall we got what we deserved, that is zero points. We didn't deserve more."
West Brom boss Roberto Di Matteo was full of praise for his battling Baggies after they won at Arsenal for the first time in 27 years.
"I would say we deserved it, the way we played, the way we created chances, scored goals and played very well," said Di Matteo.
"We pressed them very high, we pressed them all over the pitch. We managed not to let them play their usual way. And when we had the ball we passed it very well and created chances ourselves.
"I don't want us just to be pretty, I want results at the end of the day. We got a hammering at Chelsea and it wasn't a pretty week after that, but we've learned. We've cut out those mistakes and that gives us a chance to stay in a game and win things."
Source: PA
