Draw specialists Lincoln extended their unbeaten run to 10 games with a 0-0 stalemate at Cheltenham in Sky Bet League One.
Only an outstanding save from Luke Southwood prevented Mark Kennedy's Imps from taking the lead during the first half.
The on-loan Reading goalkeeper stretched to prevent Paudie O'Connor's effort from going the top corner in the 39th minute.
Lincoln came close to breaking the deadlock again 10 minutes into the second period when Southwood advanced from his box to head clear and Teddy Bishop lifted a shot from 40 yards on to the bar.
Ben House then fired wide from a good position in the 65th minute after turning Caleb Taylor to make room for a shot.
At the other end, Carl Rushworth spilled a low drive from Ryan Broom and as Alfie May tried to follow up, the striker went down under Rushworth's challenge. However, penalty appeals were waved away and Taylor headed wide in stoppage time.
The result lifts Cheltenham one place to 17th, while Lincoln's 18th draw of the campaign sees them remain 11th.