The Gunners gave away a two-goal lead to draw 2-2 with the Hammers at Upton Park.
“It is disappointing because we had a good game and get away with the minimum. I believe we were a bit unlucky today with decisions and in their kind of circumstances West Ham did fight for their life and made it very difficult,” he told Sky Sports.
“I believe we had many disadvantages in the game but overall we played a good game and unfortunately we couldn’t finish the third goal off.
“We had plenty of opportunities in the second half and in the end when the other team comes back to 2-1 and any little decision goes against you, you can pay for it.”
