Arsenal and West Ham United played out a goalless draw at the London Stadium on Wednesday night.
The Gunners have now gone three matches without a win, while West Ham secured another valuable point against a top club after their victory over Chelsea last weekend.
David Moyes' men could've had the winner in the dying moment of the game, but Javier Hernandez's effort was denied by the woodwork.
Speaking after the match, Arsenal manager Arsene Wenger attributed fatigue to his side's inability to break down the Hammers defence.
"We had so much of the ball, but it was very frustrating because we could even have lost it at the end.
"They're happy to defend, they did that against Chelsea and Manchester City, so we couldn't find the opening and the few chances we had we missed.
"I can't fault the effort of the team but West Ham were very good in defence tonight.
"There's always concern [about the table] as we are here to win games. Chelsea came here and lost and we had one day less to prepare.
"When you play every three days, you lose your sharpness."