The summoner name or tag is incorrect
berzerk #0702
BRONZE III
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Match History for Patch: 16.4.1
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Champion Stats for Patch: 16.4.1
Champion Mastery
lvl: 5
24,005
lvl: 5
23,433
lvl: 4
18,923
lvl: 4
16,627
lvl: 4
15,997
lvl: 3
9,727
lvl: 3
9,545
lvl: 3
9,256
lvl: 3
8,998
lvl: 3
8,584
lvl: 3
8,304
lvl: 3
8,125