The summoner name or tag is incorrect
centric #gen
EMERALD 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: 53
556,071
lvl: 24
231,221
lvl: 17
152,800
lvl: 14
128,589
lvl: 12
101,257
lvl: 9
66,929
lvl: 8
62,656
lvl: 8
58,531
lvl: 7
47,263
lvl: 7
45,935
lvl: 6
37,455
lvl: 6
36,053