Wicc
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You wrote that it's possible once per match, I didn't understand the meaning of that phrase. Let's say I need to play 5 games in 6 brackets; can my team play all 5 games using the substitution system?
If a player hasn't played at all, then yes, you can make such a substitution in all matches.
P.S. The regulations don't prohibit making more than one such substitution per match, but opponents are not obliged to accommodate a second substitution; it's only possible with mutual agreement (in case someone else drops out).
