Director of cricket Phil Whitticase compared some of Leicestershire's batting to watching "park cricket" as they lost a low-scoring T20 Blast tie against Nottinghamshire on Sunday.
Chasing 122 to win on a testing Trent Bridge wicket, the visitors slumped to 24-5 and went on to lose by 31 runs.
And three run-outs left Whitticase extremely frustrated.
"You wouldn't see them in park cricket, but pressure can create those moments." he told BBC Radio Leicester.
"It was a used pitch so we realised from the moment we arrived that it wasn't going to be a high-scoring game. But I thought keeping them to 120 was more than acceptable.
"For Notts to win, they had to bowl us out. We should have made sure that we were only a couple of wickets down at halfway and in a strong position.
"We talked about staying calm because there was going to be an element of pressure and there was a feeling that we wanted to be ahead of the game to a certain degree.
"But when you lose a couple of wickets like we did in the second over, there has to be some dragging back of the thought-process and a reassessment of where we are."
Leicestershire were already out of the competition but Notts are second in the South Group and are almost certain to make the quarter-finals.