The summoner name or tag is incorrect
chief #1540
GOLD I
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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: 13
118,679
lvl: 12
124,091
lvl: 11
88,130
lvl: 11
102,312
lvl: 10
77,104
lvl: 9
77,798
lvl: 9
73,610
lvl: 9
66,019
lvl: 8
64,094
lvl: 8
61,047
lvl: 8
53,833
lvl: 7
66,316