Janna's at her strongest when buffing another ally. If you can harass her ally, it will weaken her ability to fight you.
Save an interrupt ability for when Janna uses her ultimate.
Listen for the charge up sound on Howling Gale in case Janna is trying to hit you with it from off screen or from brush.
The stat comparisons shown on this page underscore several significant Senna versus Janna counter statistics that may help you explain the differences and similarities between this pair of champs. For instance, Senna’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Janna’s KDA ratio of NaN, demonstrating that Senna may be more central to her team's team fighting potential than Janna..
Senna typically has a slightly larger longest kill spree than her opponent does. On average, she takes a similar amount of damage to Janna. This typically indicates differing health capacities; however, it can also imply that the champion with higher HP has less agility and thus is unable to escape additional damage when engaged or poked.
Both League champs are great champions. Both champs have their strengths, weaknesses, and counters. In League's current meta, Senna usually wins when facing off against Janna, with a 52.8% win rate. Thus, Senna makes a good counter for Janna.
While Senna does have a higher winrate compared to Janna, when they face off with one another, Senna also has a greater difficulty level that makes her a more difficult champ to develop with. You don't need to be too worried when picking Senna into Jannaas her relative depth means you may not be able to unleash her full potential without a significant amount of practice beforehand.
Additionally, Senna also has a good amount of utility and CC, a similar amount to Janna. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there is not one best champion overall in League of Legends, in Senna vs Janna matchups, Senna is the better champ with a noticably higher win rate, similar champion depth, and a similar amount of utility to help out your team members during late stage team fights.
Senna is a good counter to Janna. You will do well by focussing your play on keeping up your gold and cs and taking out objectives. If you do that, you should hold your own as Senna against Janna.
To truly master Senna in order to counter Janna during both the laning and mid / late game phases of League of Legends, you should keep reading to gather a few extra tricks and insights into this matchup. If you mind the build and tips presented above, you will grow your win rate by a lot and be closer to League of Legends pro players.
Senna usually gets more CS compared to Janna. Champions who typically don't get much CS usualy don't have to have much CS to be valuable teammates, such as supports. They are capable of scaling well off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, often require several high cost items to be effective. In either situation, try to exceed the numbers shown on this page to do well.
The most crucial items to have in your Senna versus Janna build consist of Youmuu's Ghostblade, Edge of Night, and Bloodsong. When Senna incorporated at least these three items in her build, she performed a lot better when facing Janna than with many other common item sets. In fact, Senna had an average win rate of 52.8% when countering Janna with these items in her kit.
To have the best probability of coming out on top against Janna as Senna, you should use the Fleet Footwork, Presence of Mind, Legend: Alacrity, Cut Down, Biscuit Delivery, and Approach Velocity runes from the Precision and Inspiration rune sets. Out of all the rune builds that we analyzed for Senna vs Janna counters, this composite of runes yielded the best win rate. In fact, these runes provided a 52.8% win rate overall.
If you want to view Senna x Janna tips and builds for a a distinct player tier, please select one from the selection menu provided above. By default, the stats and strategies given are calculated using all rounds with data with both champions.