Mark Schwarzer has said that studying video footage allowed him to correctly guess where Jonathan Walters would place in his penalty.
After the match, the 40-year-old told Sky Sports News: "We looked at video footage before the game so I was confident I knew where he was going to go. I was lucky enough to get behind it.
"Any time you don't concede a goal is important. We needed the points today. You know what you are going to get from Stoke and it is especially vital at home to pick up three points."