The summoner name or tag is incorrect
gfsuppdiff #supp
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: 5
29,660
lvl: 4
18,314
lvl: 4
12,711
lvl: 3
6,411
lvl: 2
5,757
lvl: 2
5,136
lvl: 2
4,601
lvl: 2
3,339
lvl: 2
2,202
lvl: 2
2,176
lvl: 2
1,988
lvl: 1
791