JULIAN SPERONI was delighted to keep a clean sheet against West Ham United on Tuesday.
The Eagles custodian and his defence have now conceded just one goal in their last four games.
"Who would have thought a few weeks ago we would be in this situation now?" Speroni said.
"There is still a long way to go, we haven't done anything yet. It is a good feeling but we need to keep improving.
"I think it boosted everyone's confidence getting a clean sheet in a London derby, and we all dream of clean sheets, so it was a good game.
"We have been working on every single aspect of the game under Tony [Pulis].
"He's trying to put through to us the way he wants the team to play, so for that to work you need to work on all things.
"It is working for us at the moment having two strikers up front, so long may it continue.
"We need to be strong at set-pieces and Barry [Bannan] certainly did that for us with the goal too."
Hammers midfielder Ravel Morrison appeared to shove right-back Joel Ward in the face after the final whistle, but Speroni admitted he did not catch the incident.
Meanwhile, Pulis has hinted he looks set to continue with the strike duo of Marouane Chamakh and Cameron Jerome.
Both players started at Norwich City last Saturday and against West Ham on Tuesday and showed signs of a blossoming partnership, with Chamakh grabbing the winner against the Hammers.
"I thought the two played really well," said Pulis.
"Chamakh has got really good quality and he has linked up well with Cameron, and Cameron's always a threat if he plays to his strengths.
"We have got to make sure those two have a partnership and a relationship and that they play together as a pair."