The summoner name or tag is incorrect
vivian #001
EMERALD III
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Match History for Patch: 16.10.1
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Champion Stats for Patch: 16.10.1
Champion Mastery
lvl: 109
1,171,056
lvl: 67
704,741
lvl: 51
527,887
lvl: 29
291,118
lvl: 27
275,071
lvl: 18
169,055
lvl: 17
213,235
lvl: 17
195,720
lvl: 17
167,381
lvl: 17
158,210
lvl: 16
178,734
lvl: 16
147,991