Zola had seen his side go 2-0 up in just 21 minutes following goals from Ikechi Anya and Troy Deeney
But veteran striker Kevin Phillips pulled one back for the hosts just after half-time before Isaiah Osbourne struck a stoppage-time equaliser to make it 2-2.
He said: "I am disappointed in a way because I thought at half-time the game was won.
"But Blackpool played better than us in the second half and created a lot of chances so it was probably a fair result.
"In general it was a good result for us because it is not an easy place to come.
"I knew it would be difficult in the second half but I was expecting my team to perform better than we did.
"We couldn't hold the ball and we kept giving it away and that was the difference between drawing the game and getting three points.
"The changes Blackpool made in their midfield in the first half had a bearing on the final result.
"We got tired and Blackpool put us under a lot of pressure but when you come here a point has to be a good result but after being two goals up you have to say it is two points dropped.
"We weren't sure how Blackpool would play under the new manager but my concern was to have my team playing well and we did that in the first half."