The summoner name or tag is incorrect
bobthebuilder #diff
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: 45
470,510
lvl: 17
157,879
lvl: 16
145,213
lvl: 14
122,822
lvl: 13
136,852
lvl: 12
100,249
lvl: 11
93,865
lvl: 11
92,375
lvl: 11
91,558
lvl: 10
86,181
lvl: 10
83,697
lvl: 10
78,998