Pearson said Leicester had questioned the size of the goal posts before kick-off after his goalkeepers had raised some concerns, but the match officials said it was not a problem.
"The goalkeepers felt they were a bit high," Pearson said. "I thought it was in everyone's best interest to get it checked and it was quite light-hearted.
"The officials were slightly surprised, but everything was fine. I could have done with it being a bit smaller!
"It is very easy to look at the goals and lay the blame for defeats but ultimately what you do with the ball when you have it is equally important, if not more.
"We didn't do enough with the ball and then it becomes a frustrating day."
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