Arsene Wenger struggled to explain how Arsenal slipped to a first defeat at the Emirates Stadium against relegation-battlers West Ham.

The Gunners dominated and created a number of clear chances.

However a combination of great goalkeeping from Robert Green and wayward finishing made them pay.

Bobby Zamora lobbed in a fine effort during first-half stoppage time for Hammers.

It was a similar story following the restart, when despite throwing everything forward, the goal just would not come for Arsenal.

Wenger said: "We should have scored 10 and in the end we lost 1-0, so it is very difficult to understand how it happened.

"I can never remember a game like that. It was one-way traffic from the first minute to the last.

"We missed early chances, especially one against one with the keeper and then there was always more pressure on the next one to finish it off.

"In the end, they scored one which looked to me offside.

"It is very difficult to find a logical explanation to our defeat because we produced the performance I expected.

"That is a little bit of the disease we have shown all season - creating, creating, creating, and not finishing."

Arsenal 0 West Ham 1