The summoner name or tag is incorrect
coldworld #562
SILVER III
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Match History for Patch: 16.9.1
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Champion Stats for Patch: 16.9.1
Champion Mastery
lvl: 15
138,392
lvl: 10
90,477
lvl: 10
75,937
lvl: 8
62,754
lvl: 7
52,744
lvl: 7
50,842
lvl: 7
50,429
lvl: 7
49,281
lvl: 6
49,436
lvl: 6
39,037
lvl: 6
32,599
lvl: 4
20,805