The summoner name or tag is incorrect
elster #cold
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: 41
427,598
lvl: 22
217,429
lvl: 19
185,133
lvl: 18
172,814
lvl: 13
117,384
lvl: 13
110,319
lvl: 11
93,163
lvl: 11
90,116
lvl: 11
88,953
lvl: 11
88,943
lvl: 10
88,398
lvl: 10
86,490