The summoner name or tag is incorrect
balteer #na1
SILVER II
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Match History for Patch: 16.6.1
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Champion Stats for Patch: 16.6.1
Champion Mastery
lvl: 13
112,081
lvl: 10
81,211
lvl: 9
74,679
lvl: 7
50,195
lvl: 7
43,692
lvl: 6
40,588
lvl: 6
40,486
lvl: 6
39,964
lvl: 6
38,666
lvl: 6
37,846
lvl: 6
35,211
lvl: 6
34,554