The summoner name or tag is incorrect
sven #2948
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: 16
145,025
lvl: 9
75,075
lvl: 8
55,703
lvl: 7
43,603
lvl: 4
21,308
lvl: 4
19,631
lvl: 4
19,486
lvl: 4
18,462
lvl: 4
15,213
lvl: 3
9,000
lvl: 3
8,379
lvl: 3
7,967