The summoner name or tag is incorrect
cas #0111
SILVER IV
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Match History for Patch: 16.7.1
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Champion Stats for Patch: 16.7.1
Champion Mastery
lvl: 23
262,915
lvl: 22
212,435
lvl: 18
185,162
lvl: 12
101,569
lvl: 10
76,939
lvl: 9
73,570
lvl: 9
70,978
lvl: 9
69,509
lvl: 7
50,369
lvl: 7
49,548
lvl: 7
46,357
lvl: 6
37,207