Tottenham Hotspur manager Mauricio Pochettino has admitted that Crystal Palace were the better side in the final 15 or 20 minutes.
Visiting Tottenham took the lead through Harry Kane in the opening minutes of the second half, but Palace scored twice thereafter to win the match 2-1.
Benjamin Stambouli was adjudged to have brought down Joe Ledley inside the Tottenham penalty box in the 69th minute, and Dwight Gayle slotted home the spot kick with ease.
Jason Puncheon scored Palace’s second goal 10 minutes from time to send the home fans into delirium.
Pochettino was not happy with the penalty decision, but he admitted that the Palace players were physically better after scoring the equaliser.
"Yes [decisions were key today],” BBC Sport quotes the Argentine as saying. “After I think 65 minutes we were in control of the game, the penalty changed it all, the energy, it changed all.
“The decision, maybe it wasn't a penalty and it is key in the result. From my dugout it's difficult to give my opinion but my players say he never touched the player.
"Harry Kane's [penalty shout] was the same as the penalty for Crystal Palace. Difficult to see from my position, but one against us and though we conceded another goal, maybe it's important, this decision.
"It was difficult after we conceded the goal. They showed more energy than us in the last 15 or 20 minutes. For that I'm disappointed, after we conceded, Crystal Palace were better."
The defeat leaves Tottenham in fifth place in the Premier League table with 34 points from 21 matches.