Holtby says he worked with Kolzig to go back to his old, aggressive style.
"Nothing against what the philosophy was with the changes," Holtby said. "I think it just had to do with my personality, my natural instincts that didn't quite coincide with the changes and that led to a lot of second guessing myself and a lot of over-thinking things. The moment you start doing that you start to struggle and once you struggle your confidence goes down a bit. That's something to learn from."