The summoner name or tag is incorrect
arete #7743
SILVER 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: 12
97,717
lvl: 8
63,172
lvl: 7
50,248
lvl: 7
48,641
lvl: 7
48,375
lvl: 6
42,304
lvl: 6
39,473
lvl: 6
38,143
lvl: 6
33,957
lvl: 6
33,315
lvl: 6
33,048
lvl: 5
30,350