How to Play Update :Reserve Match :
If you have time, you can play a match with a future possible opponent.
Example, you should play the winner of match "Player A vs Player B", but they still didn't play. So you can play a Reserve Match against Player A, if you both want. In case Player A wins his match against Player B, then the result of your Reserve Match against Player A will be used.
You can play a Reserve Match with any possible future opponent, even several rounds earlier.
Be sure to agree with your opponent that you're playing a Reserve Match for your current tournament, and not a practice match.
Post the result of your Reserve Match in your tournament's official topic, stating "Reserve Match", name of your opponent, score and Round.