The Blues were held by a stubborn Hammers outfit at the London Stadium, with both sides missing good chances to break the deadlock.
"We knew it was a difficult place to come and win," he said. "You can try and play behind the lines - and with the quality we have we should do better - but it's hard when they have men behind the ball.
"We could have won because we missed a lot of chances but we also could have lost because they missed a lot of chances.
"We're not happy with the draw because we just want to win games but when you see the chances they've had, I think we can be happy. A draw is a fair result."