Palace boss Tony Pulis was a disappointed man following the 1-0 defeat against Newcastle United.
The Eagles were unfortunate to go down to a 94th minute strike from Papiss Cisse - and Pulis believed the final whistle should have been blown before the Senegalese striker's header hit the back of the net.
"The disappointing thing is, when looking at the pictures after the game, we thought we should have had a free-kick outside their box with 20 seconds to go - and then they go down the other end and score, which is over time," the gaffer said.
"In the first half, the referee has played, I think, a minute and 40 seconds over time and the second half, I think it's three minutes, 40 seconds when they score the goal. The fourth official said it was time when we thought their defender had handled - so from them going down the other end, I think it was 40 seconds."
Away from the conclusion of the match, the boss was pleased with his side's performance in what was their second trip to the north-east in eight days.
"The fixtures haven't been kind to us with two long journeys in a week so I made a couple of changes to the line-up because of that," Pulis added. "But the players have done really well and to be beaten by the last kick of the game was disappointing. We did really well in the first hour or so but I felt we tired as the game went on.
"I think we created some good chances. We had good opportunities in the first half and in the first 15 minutes of the second half.
"You know when you come to a club like Newcastle they are going to create chances and you are going to have to defend but we did that when needed and it is difficult to leave here with nothing to show for our efforts."
Pulis said that other results around the league made the last-gasp loss all the more frustrating, as Palace missed the chance to gain points on the likes of Fulham, Cardiff City, Sunderland and West Brom, who all lost on Saturday. But the gaffer remained level-headed after the defeat at St James' Park.
"We have to remember what we are up against," Pulis said.
"Today we came to a club like Newcastle who have a great history and crowds of over 50,000 in this stadium and we are in our first season back in the Premier League after getting promotion.
"We now know what is needed to be done in the remaining games, they are all big and we will put the work in on the training ground each week to make sure we are ready for the challenges as they come along".