A second 0-0 in three days at Selhurst Park saw Palace slip to fourth in the league table after fighting out a stalemate with Portsmouth. The clean sheet meant Dougie Freedman's men equalled a club record for consecutive games without conceding - six.
Freedman made three changes with Darren Ambrose, Jonathan Parr and Kagisho Dikgacoi (KG) coming into the starting line-up as Palace looked to make it five wins out of six against Portsmouth.
The opening fifteen minutes saw both teams look confident in possession but defences on top, with Anthony Gardner in particular impressing with his assured reading of the game.
It took twenty minutes for either side to create and it was Palace who almost opened the scoring after good play down the right from Wilfried Zaha and Nathaniel Clyne. The full back found Zaha and kept going for the cut back but having got into a great position found the ball stick between his feet when the goal beckoned.
The visitors then had two close efforts of their own, Liam Lawrence heading over from Tal Ben Haim's cross and then Jason Pearce crashing his header against the post from Lawrence's free-kick with Julian Speroni stranded.
Palace were playing good, attacking football but Portsmouth's experienced side were dealing well with crosses from Parr and Moxey as the Eagles used the left-hand side as the main point of attack.
The visitors were the first to threaten in the second half when Joel Ward's cross-shot from the left almost drifted over Speroni's head but the experienced goalkeeper did well to turn the ball behind.
As the second half went on the game became more and more attritional with neither side able to break through the other's resolute defence, Glenn Murray in particular looking isolated at times.
Freedman reacted to that by sending on Jermaine Easter for Ambrose but still there was no breakthrough as the Portsmouth defence held firm. With ten minutes to go both Easter and Dean Moxey had good efforts blocked but Stephen Henderson in the Portsmouth goal still hadn't made a save of note.
Down the other end Dave Kitson almost stole all three points for the visitors, heading over from seven yards when well-placed from Erik Huseklepp's cross. It wasn't to be though and the game ended 0-0, leaving Palace lying fourth in the Championship.
Crystal Palace: 1. Julian Speroni, 2. Nathaniel Clyne, 3. David Wright, 4. Jonathan Parr (11. Sean Scannell '59), 5. Patrick McCarthy (c), 6. Anthony Gardner, 7. Darren Ambrose (19. Jermaine Easter '73), 8. Kagisho Dikgacoi, 16. Wilfried Zaha, 17. Glenn Murray, 21. Dean Moxey
Subs Not Used: 34. Lewis Price, 28. Stuart O'Keefe, 38. Peter Ramage
Bookings: Gardner, Moxey
Portsmouth: 13. Stephen Henderson, 2. Joel Ward, 3. Ricardo Rocha, 4. Aaron Mokoena, 5. Jason Pearce, 7. Liam Lawrence (c) (10. Erik Huseklepp '83), 8. Hayden Mullins, 11. Luke Varney, 18. David Kitson, 19. David Norris, 20. Tal Ben Haim
Subs Not Used: 1. Jamie Ashdown, 14. Abdul Razak, 24. Bjorn Helge Riise, 27. Kanu
Bookings: Norris, Varney
Att: 12,933 (Away: 1,318)