The summoner name or tag is incorrect
3rdclassengineer #na1
SILVER III
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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: 119
1,379,424
lvl: 11
95,444
lvl: 9
93,362
lvl: 7
61,981
lvl: 6
38,999
lvl: 6
35,774
lvl: 6
29,779
lvl: 4
17,024
lvl: 4
12,813
lvl: 4
12,732
lvl: 3
7,103
lvl: 3
6,899