The summoner name or tag is incorrect
mmcfly #na01
EMERALD III
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Match History for Patch: 16.4.1
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Champion Stats for Patch: 16.4.1
Champion Mastery
lvl: 57
593,913
lvl: 35
352,832
lvl: 30
333,006
lvl: 28
275,010
lvl: 19
180,677
lvl: 16
168,701
lvl: 15
132,240
lvl: 14
157,095
lvl: 13
116,340
lvl: 13
111,390
lvl: 12
118,584
lvl: 12
108,460