The summoner name or tag is incorrect
lex #0221
SILVER I
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Match History for Patch: 16.10.1
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Champion Stats for Patch: 16.10.1
Champion Mastery
lvl: 11
95,986
lvl: 9
66,881
lvl: 8
54,869
lvl: 7
46,752
lvl: 7
45,325
lvl: 7
45,075
lvl: 7
42,779
lvl: 6
36,123
lvl: 6
35,828
lvl: 5
31,097
lvl: 5
29,700
lvl: 5
28,794