"We didn't manage the ball well enough, and didn't give ourselves the best chance to win the game," Pearson is quoted as saying by BBC Sport.
"We weren't positive and made too many unforced errors. We had some pace out there today, but unless you utilise your own possession, it makes it very difficult to maximise those players' strengths.
"We huffed and puffed but without the quality we've shown in other games. The way we've played so far this season, I know we're better than what we've shown today."
Leicester have the chance to bounce back from this disappointment when they host West Bromwich Albion next weekend.