The summoner name or tag is incorrect
spencer #111
PLATINUM 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: 272
3,129,488
lvl: 52
558,887
lvl: 16
147,814
lvl: 10
84,541
lvl: 10
84,458
lvl: 9
71,279
lvl: 9
68,525
lvl: 7
51,811
lvl: 6
36,393
lvl: 6
35,808
lvl: 5
29,530
lvl: 4
16,481