The summoner name or tag is incorrect
river #274
EMERALD II
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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: 48
677,614
lvl: 41
431,900
lvl: 18
211,908
lvl: 16
210,046
lvl: 14
160,957
lvl: 9
99,274
lvl: 9
87,240
lvl: 9
81,969
lvl: 9
71,970
lvl: 8
70,041
lvl: 8
61,490
lvl: 8
56,915