West Ham boss Manuel Pellegrini admitted frustration after their 2-2 draw with Brighton.
The Irons came from 2-0 down to draw 2-2 thanks to Marko Arnautovic's brace.
Pellegrini said, “I'm absolutely frustrated.
"The most important way that Brighton scores is from set pieces, they had seven goals form corners, and we allowed them to score two goals this way. I don't remember any other chances for them, but we didn't create in the first 45 minutes."