The summoner name or tag is incorrect
regularonion #0000
GOLD IV
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Match History for Patch: 16.6.1
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Champion Stats for Patch: 16.6.1
Champion Mastery
lvl: 70
830,261
lvl: 43
538,794
lvl: 43
471,756
lvl: 31
401,049
lvl: 28
350,003
lvl: 13
113,471
lvl: 10
85,073
lvl: 10
81,415
lvl: 9
71,588
lvl: 8
54,055
lvl: 7
50,681
lvl: 5
31,427