Exeter City manager Paul Tisdale is worried that injuries could affect his side's consistency after they extended their unbeaten run to four games.
On-loan midfielder Matt Oakley and goalkeeper Artur Krysiak both came off in the 0-0 draw with Carlisle.
"Matt's a definite doubt, Jake Taylor's going to be away on international duty [with Wales] and Artur is a question mark," he told BBC Radio Devon.
"We may lose that continuity we've had over the past three or four games."
Tisdale said the draw with Carlisle was harder to watch than City's previous match when they drew 4-4 with Sheffield United.
"In many ways that was more nerve-wracking for me because the game was so much in the balance for 90 minutes," he said.
"The players needed to perform different things in order to get a result and today they were required to do something different and that was to keep their heads and play safe.
"We particularly did well on the second phase, when balls went in the box.
"It went loose, still in the box, and we got to the ball so quickly and stopped them having shots on target."