Crewe manager Steve Davis has questioned his the fitness levels of his players after they let another lead slip in a 1-1 draw with Walsall.
Davis' side have now drawn three successive League One games 1-1, having gone in front on each occasion.
"We have not been able to stay on the front foot and sustain that amount of energy and pressure," the 49-year-old told BBC Radio Stoke.
"You would have thought they would be fit by now, after all those games."
The three consecutive draws have left Crewe 20th in the table, just two points above the relegation zone, with two games left to play.
In each game, the Railwaymen have scored early goals in encouraging first-half performances before letting their lead slip.
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"That's the disappointing thing - not being able to sustain our first half performance," continued Davis.
"You're left scratching your head as to why that keeps happening. Whether it's a nervous thing that saps their energy, I don't know."
Crewe face Coventry and Bradford in their remaining fixtures and Davis is determined to find an improvement.
"That has been our problem and we will have to try and find the answers," he added.
Meanwhile, midfielder Chris Atkinson has been ruled out for the rest of the season after dislocating his shoulder in the draw with Walsall.