The summoner name or tag is incorrect
cube #1999
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: 151
2,072,546
lvl: 82
877,212
lvl: 32
318,702
lvl: 21
244,369
lvl: 20
236,294
lvl: 6
53,679
lvl: 6
47,675
lvl: 6
44,524
lvl: 5
39,913
lvl: 5
36,017
lvl: 5
27,172
lvl: 5
22,837