Patrick Vieira has suggested that his Crystal Palace players need to show more character during the second half of Premier League matches.
Despite having impressed on occasions this season, particularly against the higher-profile teams, Palace only remain outside of the relegation zone on goal difference.
That is a consequence of losing points from winning positions, Palace having the advantage on four occasions without going on to claim all three points.
The Eagles were leading Brentford by a 1-0 scoreline on August 30 before they conceded an equaliser in the 88th minute.
Meanwhile, last weekend, Palace netted the opening goal against Chelsea before eventually succumbing to a Conor Gallagher strike which was scored in the final minute of normal time.
The Frenchman addressed the issues at his pre-match press conference ahead of facing Leeds United on Sunday, acknowledging that it has not been lost on him that a mentality change is required.
Speaking to reporters, Vieira said: "It's going to be a challenging game. We know how good Leeds can be and how well they can play.
"At the same time we're at home and I've been pleased with the way we've played the last couple of games, even if we didn't get the results we deserved.
"We need to improve some parts to allow us to win football matches. We have to be at our best. We have to take our chances. We have to be more clinical in both areas of the field.
"We conceded a late goal when we went five at the back and when we were four at the back, I don't think it's something to do with the system we are using."
Both Palace and Leeds head into the fixture at Selhurst Park having failed to win any of their last four matches in the top flight.
