The summoner name or tag is incorrect
tempestrius #na1
EMERALD III
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Match History for Patch: 16.4.1
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Champion Stats for Patch: 16.4.1
Champion Mastery
lvl: 5
29,670
lvl: 5
27,501
lvl: 4
20,198
lvl: 4
17,638
lvl: 4
17,086
lvl: 4
15,764
lvl: 4
14,659
lvl: 4
14,534
lvl: 4
13,441
lvl: 3
9,234
lvl: 3
8,506
lvl: 3
8,505