The hosts had to come from behind to earn the point, with Iraola admitting they weren't at their best.
Iraola said, "I think probably a draw is not the result we wanted but we've paid for our slow start. It's taken us a lot of minutes to swich on. In the second half we were much better and closer to winning the game. But we've paid for this slow start. We conceded the first goal and after it becomes difficult.
"It's true, we are getting decent results. It's difficult to go eight games without a loss in the Premier League. We are probably drawing to much. We have been drawing a lot in the Premier League. Some of them are very good draws, others not so good.
"Thirty-nine points, we lose today a chance to get those magical 40 points that everyone marks as the first thing. But we have to keep going. In three days we play Brentford so let's go."
On Marcus Tavernier's great cross for Evanilson's equaliser: "Yes, and even the first action of Ryan Christie. In the first half we said we were losing a lot at free-kicks. We said just take it quickly, and give some rhythm into the game. It was difficult today to get rhythm into the game. I don't think the referee has helped a lot. We did this a little bit more with tempo and with the subs I think we got a little bit more at least.
"We are a team that sees the overall picture. We score a lot of goals and concede a lot of goals. Probably for us the first goal is not important because we've won a lot of games after conceding the first goal and have lost a lot of games after scoring the first goal. It's something we need to improve, the last few games we haven't started well and this makes the game more difficult. "