Crystal Palace manager Patrick Vieira says his side were too naive in the second half of their Premier League game against Nottingham Forest on Saturday.
The Eagles suffered their fifth defeat of the season at City Ground, losing by a single goal after Morgan Gibbs-White secured all three points with his 54th minute strike past Vicente Guaita.
Palace had failed with a golden chance to take the lead the game themselves when Wilfried Zaha won a penalty in the first half, only for the Ivorian to then send his spot-kick well wide of Dean Henderson's post.
