The summoner name or tag is incorrect
nested #na1
SILVER I
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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
134,639
lvl: 11
94,394
lvl: 10
84,789
lvl: 9
67,673
lvl: 8
59,237
lvl: 8
56,909
lvl: 8
53,784
lvl: 8
53,754
lvl: 7
49,975
lvl: 7
48,344
lvl: 6
41,656
lvl: 6
37,426