I will leave some insider scrimbux that I got about KRU in NA, don't ask me the source:
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KRU won 100T for 19-5 in scrim, and Asuna confirmed in a recent 100T video for Youtube that they are a very strong team.
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KRU beat every Tier 2 team in NA and stomped almost all of them.
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Scrims against Tier 1 NA teams were almost always 50/50, recently Shahzam said in the stream that he trained with KRU and that they are an excellent team, but I don't have any details about that yet.
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One of KRU players said in Teddy's stream that NA teams stand out for their FPS tactical structure and that they hardly make dumb decisions in the middle of the round, and that they react to opponents' actions very quickly, but that individually he believes that in Brazil/South America there are more talented players. He also said that they trained a lot against Havan and VK and said he believes the level is the same with tier 1 NA teams and that 100T and Envy shouldn't have an easy life in the group stage against these teams as many people think