The summoner name or tag is incorrect
supremesovereign #000
BRONZE I
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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: 29
465,103
lvl: 23
228,881
lvl: 13
118,185
lvl: 12
98,469
lvl: 9
70,891
lvl: 8
60,420
lvl: 7
52,845
lvl: 7
50,634
lvl: 7
49,202
lvl: 7
46,692
lvl: 7
44,552
lvl: 7
43,130