The four-goal show followed their achievement last weekend in reaching the FA Cup semi-final and a meeting against Bolton.
Pulis said: "We are pleased, we knew it was going to be a tough game. On the back of what we did against West Ham there was a concern the players might not be focussed and a little bit drained.
"We are doing things at this club that have not happened for 39 years. The players are not used to the pressure of playing in these competitions at the level we are dealing with now."
Source: PA
Source: PA