The summoner name or tag is incorrect
psyduck #015
EMERALD IV
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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: 57
606,042
lvl: 34
350,365
lvl: 27
270,044
lvl: 22
213,357
lvl: 15
161,291
lvl: 14
163,833
lvl: 14
129,014
lvl: 13
118,180
lvl: 12
129,131
lvl: 10
93,013
lvl: 10
90,307
lvl: 9
96,374