Q: How can I withdraw from an upcoming tournament round?

A: You can see the listing of all tournament rounds you are playing in by selecting Tournaments or Compete → Tournaments in GameKnot's main menu, and scrolling down the page. There is a "withdraw" link available for each tournament on that page.

However please note that it is only possible to withdraw from the future tournament rounds. If the round had already started (i.e. the games have been started), it is no longer possible to withdraw.