Riven vs Nautilus

Rank	Win Rate	Nautilus wins50 %Riven wins	Games
Iron	too few games		4
Bronze	too few games		10
Silver	too few games		16
Gold	too few games		22
Platinum	too few games		23
Emerald	too few games		16
Diamond	too few games		3
Master	too few games		6
Grandmaster	too few games		2
Challenger	too few games		1

Rows count games as played (103 in all). The head weights each rank by its real share of ranked players (122 weighted games), so the rows do not add up to it. Patch 26.21: 83 games, too few for a win rate Games from patch 26.19 to 26.21