Although the result will come as a huge shock to a team that won the title by 11 points last term, West Brom boss Clarke was not surprised.
"Anybody listening to me before the game would know I said I was coming here to be positive to try to play," he said.
"The players must have been listening as well because they did that.
"Against the reigning champions you have to play almost the perfect game.
"We could have had more. We looked a threat every time we went forward.
"It's not about the fear factor. West Brom has always been capable of coming to these sorts of places, defend doggedly and nick a winner or a draw.
"But I want to try to win the game and we achieved that."
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