Arsene Wenger described Sunday's derby as 'two points dropped' for his Arsenal side.
The Gunners defended stoutly after having Emmanuel Eboue sent off in the 38th minute.
They also had a goal chalked off in the first half and carved out two late chances - Alex Song angled his effort just wide and Nicklas Bendtner forced Carlo Cudicini into his only save of note in injury time.
However, Manuel Almunia saved well from Aaron Lennon, Luka Modric and Wilson Palacios in the first half, Lennon also drove just wide and after the break, Roman Pavlyuchenko fired wide from a good position, Robbie Keane headed inches over and volleyed just wide and then Almunia saved one-on-one from Modric in added time.
"I believe we had a resilient, committed attitude and I'm proud of our attitude during the 90 minutes," reflected Wenger.
"But I feel it is two points dropped because we had the best chances and we scored a regular goal that was ruled out by an illusionary foul seen by only the referee. I watched it three times on television and I still don't see what was wrong. That is why at the end of the day it's frustrating.
"We keep going. We have a momentum it is true but we didn't score today. We haven't lost for 11 games now and we just keep going."