Pardew had no doubt about James's contribution to Pompey's cup triumph.
He said: "David was magnificent. If we had gone in at the break with a thoroughly deserved lead I think the game's outcome would have been completely different.
"But James pulled off two world class saves and was at it again just a minute after the break when we should have opened the scoring.
"When you are up against someone of his class it's always going to be difficult."