The summoner name or tag is incorrect
declaredstew #0000
SILVER III
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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: 33
338,310
lvl: 14
122,213
lvl: 13
114,447
lvl: 11
97,138
lvl: 11
91,948
lvl: 11
114,848
lvl: 8
66,871
lvl: 7
54,502
lvl: 7
51,825
lvl: 7
51,203
lvl: 7
47,367
lvl: 7
47,199