Despite dominating for long periods Arsenal could only manage a scoreless draw with West Ham.
Emmanuel Adebayor wasted a disappointing game's two best chances as the Hammers soaked up almost constant Gunners pressure.
West Ham stretch their unbeaten run to eight games whilst Arsenal's Champions League hopes suffered a blow.
Gunners boss Arsene Wenger said, "We had 70-30 possession but they defended very well as a team.
"We were very close to scoring and gave everything, but couldn't get the goal which would get us the three points.
"You have to continue fighting, usually we get a goal in last 15 minutes when they defend like that us against us."