The summoner name or tag is incorrect
flintrovert #00001
BRONZE III
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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: 33
338,313
lvl: 18
174,515
lvl: 17
162,655
lvl: 9
71,207
lvl: 7
49,111
lvl: 7
48,536
lvl: 6
41,236
lvl: 6
41,132
lvl: 6
35,664
lvl: 6
34,587
lvl: 6
33,120
lvl: 6
32,745