The summoner name or tag is incorrect
yaithe #0401
IRON 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: 39
452,907
lvl: 36
373,650
lvl: 22
323,481
lvl: 18
167,560
lvl: 16
179,957
lvl: 7
46,347
lvl: 6
39,798
lvl: 5
36,516
lvl: 5
26,615
lvl: 5
24,901
lvl: 5
24,582
lvl: 5
24,140