The summoner name or tag is incorrect
buglubs #na1
SILVER 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: 81
858,011
lvl: 31
308,465
lvl: 28
319,820
lvl: 16
154,737
lvl: 10
86,377
lvl: 10
79,156
lvl: 10
76,393
lvl: 9
77,797
lvl: 9
67,149
lvl: 9
66,334
lvl: 7
54,691
lvl: 7
51,764