The summoner name or tag is incorrect
corporaljackson #5152
EMERALD IV
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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: 20
190,676
lvl: 17
158,566
lvl: 17
153,162
lvl: 16
151,804
lvl: 14
127,247
lvl: 14
123,844
lvl: 12
99,802
lvl: 12
100,234
lvl: 11
92,225
lvl: 10
84,447
lvl: 10
83,690
lvl: 10
82,208