The summoner name or tag is incorrect
foster #na1
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: 163
2,022,764
lvl: 33
331,881
lvl: 15
152,121
lvl: 14
129,885
lvl: 13
109,311
lvl: 10
80,303
lvl: 10
78,971
lvl: 9
66,144
lvl: 9
64,792
lvl: 8
64,552
lvl: 7
51,194
lvl: 7
45,014