To access this option, click the down arrow next to Action on the horizontal Tournament Management bar and select Cancel Tournament. A small box pops up and asks if you are sure you wish to cancel the tournament. When you answer Yes, a second small box pops up and asks if you are REALLY sure. You must confirm again by clicking Yes. This is a fail safe to prevent accidental cancelations. Double check that you wish to cancel before confirming the second time, especially if you have multiple tournament running.