Janna vs Senna Counter Pick
Matchup Summary
What the Data Means
In Support, this is Janna versus Senna — a support/mage hybrid against a support/marksman hybrid. The sample behind this page is 1,945 games from patch 16.13.1, and Janna wins 48.5% of them. Sitting 1.5 points below the 50% line marks Senna as a genuine problem pick for Janna.
Both champions are ranged (Janna at 550, Senna at 600), so the lane is decided by cooldowns rather than reach.
Track Zephyr on Janna and Dawning Shadow on Senna — the lane swings on those two. Monsoon and Dawning Shadow are the two buttons that end the exchange outright.
Neither profile surprises the other: Janna and Senna are both magic threats. Level-one bases: Janna 570 HP / 28 armour / 30 MR, Senna 530 / 25 / 30. Late-game bases read 2100 health / 104 armour for Janna and 2043 / 93 for Senna. Speed reads 325 to 330, handing Senna the better rotations.
Treat 1,945 games as the confidence attached to 48.5%.
FAQ
No — current data marks this as a counter matchup: Senna has the statistical edge. Janna wins 48.5% of the recorded games.
48.5% from Janna's perspective, measured on patch 16.13.1.
1,945 ranked games at Emerald rank and above, across all regions.
The current Janna build — items, runes and skill order from the same data set — is on the Janna build page.