In an impressive punching power punching display, #1 ranked WBO junior middleweight contender Tim Tszyu (22-0, 16 KOs) took apart the upset-minded Tony Harrison (29-4-1, 21 KOs), wearing him down with heavy power shots to knock him out in round one on Saturday night in their headliner on Showtime at the Qudos Bank Arena in Sydney, New South Wales, Australia.