Sorry I was unclear but I mean say its the first game and both players are drawing on prizes. The next prize wins yeah?
What happens if this is the case and no one can claim a prize? Just wait until someone decks out? but again there is ways to avoid this using Uxie etc.
If the players set up an infinite loop and aren't going to complete the game, affecting the flow of the overall tournament, Double Game Loss is an option that the Head Judge can use.