If you look at how Wladimir Klitschko has been beaten in the past, it was mostly by fighters who were very aggressive in the first five rounds. Ross Purity who was only about 6’3", but 250 lbs, did it in the 11th round, but Wladimir was easily beating him and ran completely out of gas in the 11th round. He lost that fight through bad conditioning. You can not play "peek a boo" with Klitschko. Standing straight up with gloves to face, waiting for a counter punch, is a very bad idea, no matter how fast you think you are. Stay disciplined bring the big man to you. Make him lean forward, and throw his right hand from awkward positions across his body to "his" left. Double the jab to the body, the stomach and the throat. Do not go for his head unless it’s in range or at your eye level. Keep it simple, but keep it small. Pivot away from his power and wait for your shots. The most important thing to remember is that Wladimir Klitschko has been hurt before by smaller men. He can be hurt again and like David haye said "No, he is not too big to hit, he is too big to miss."