The summoner name or tag is incorrect
nightcore #002
EMERALD 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: 46
480,603
lvl: 16
143,407
lvl: 15
137,326
lvl: 14
123,471
lvl: 10
79,667
lvl: 9
89,184
lvl: 8
63,294
lvl: 7
48,881
lvl: 7
47,462
lvl: 6
34,413
lvl: 6
33,455
lvl: 5
28,922