In general pausing in League of Legends tournaments is not possible, unless they have the setting "Tournament draft". Some of the bigger tournaments on Challengermode like the Sunday Brawl have pause switched on. 

But unfortunately, the pausing function is often abused by some players meaning that we as the tournament provider are not able to make sure that pausing is used correctly and within the rules we've set (15 min per team). In addition, 30 minutes of total pause time is too much for something like a 1v1 tournament.

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