The summoner name or tag is incorrect
grindset #001
SILVER II
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Match History for Patch: 16.9.1
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Champion Stats for Patch: 16.9.1
Champion Mastery
lvl: 5
24,995
lvl: 2
5,042
lvl: 2
3,482
lvl: 2
2,021
lvl: 1
1,257