Ian Black admits Rangers have no excuses for the 1-1 draw with Elgin City which cost them their 100% Ibrox record in the Third Division.
The Light Blues were aiming for their 12th successive win in yesterday's clash and looked set to hold on for the points thanks to an early opener from Lewis Macleod.
However, the visitors were able to snatch a late leveller courtesy of goalkeeper Neil Alexander's own-goal blunder from an Elgin free-kick.
Rangers remain 17 points clear at the summit but Black knows their performance was not up to scratch as they edge closer to wrapping up the title.
He said: "It was very frustrating, having created the chances that we did in the first half.
"Their goalkeeper had a good game but we can't make excuses.
"We know we are supposed to be concentrating for the full 90 minutes and we went to sleep.
"They got the chance and they punished us."
Elgin's draw was all the more impressive considering they played the entire second half with 10 men, following Paul Harkins dismissal for a challenge on Black late in the first half.
The former Hearts man added: "You think, when they go down to 10 men, that we can kick on.
"We played nice football but we never really played penetrating passes and tried to kill them off.
"We know we should have killed it off."
Elgin boss Ross Jack was unhappy with the sending off, while Rangers manager Ally McCoist felt the red card was harsh.
Asked for his own view of the incident, Black said: "I was lying on the floor so I don't know if it was bad or not but the referee obviously thought that it was.
"He caught my ankle and burst the boot so he did catch me but I don't know if he was lunging or jumped in with two feet. I couldn't tell you."
Black said the rest of the players will help ensure Alexander recovers from the mistake that gifted Elgin a share of the points.
He said: "He's disappointed. We are not going to kick him when he's down.
"We will pick him up. It's a team game and we are all in it together.
"The big man will be fine and we will look forward to the next game."
Meanwhile, Ross Perry's facial knock may not be as bad as first feared.
Perry was forced out of the action following a clash of heads and McCoist said post-match he thought the defender may have suffered a broken nose.
However, Perry said on Twitter last night: "I've prob looked better but hopefully just bad swelling. Nothing feels broken. I'll just look like a panda for a wee while. Training Monday!"