Bogdan made a string of top stops before Ryan Nelsen beat him on 74 minutes.
Gareth Bale made it two and although Kevin Davies pulled one back, Louis Saha scored with the last kick of the game.
Redknapp said: "I've never seen the keeper make so many saves.
"It was save after save, we hit the woodwork, we just couldn't get a break.
"We pummelled them, he continued to make saves but eventually the goals came."