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 strategic Zeri vs. Janna counter stats that may help you grasp the distinctions between the two. For instance, Zeri’s KDA ratio ([kills + assists] / deaths) of NaN is more than Janna’s KDA ratio of NaN, showing that Zeri may be more central to their team's team fighting capability than Janna. This observation is in large part caused by the difference in kills.
Zeri often has a much larger longest killing spree than their foe does. On average, they takes more damage than Janna. This typically indicates differing health capacities, but it can also illustrate that the champion with increased HP has less agility and thus is not able to flee from further damage when poked or engaged.
Both League champions are great champions. Both champs have their pros and cons. In League's current meta, Zeri usually loses when playing against Janna, with a 43.8% win rate. Therefore, Zeri makes a poor counter to Janna.
While Zeri does have a much lower winrate than Janna, when facing one another, Zeri also has a lower difficulty level that makes them a less challenging champ to learn. You should be very concerned when picking Zeri into Janna.
Additionally, Zeri has some amount of CC and other utility, a similar amount to Janna. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there isn't a single best champion overall in League of Legends, in Zeri vs Janna matchups, Janna is the better champ with a much lower win rate, less champion complexity, and a similar amount of utility to help out your teammates during team fights.
Zeri is a trash counter for Janna. You will do well by focussing your strategy on maximizing your CS and taking out objectives. If you can do that, you should hold your own as Zeri against Janna.
If you would like to learn all of the intricacies of Zeri to counter Janna during both the laning and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tips and tricks for this matchup. If you pay attention to the build and tips displayed above, you should grow your win rate by a lot and be closer to League of Legends pro players.
Zeri typically picks up much more CS relative to Janna. Champs who typically don't acquire much CS usualy don't have to have much CS to be effective, such as support champions. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, typically need many items to be effective. In either case, try to surpass the numbers reported on this page to do well.
The top items to prioritize in your Zeri versus Janna build include Experimental Hexplate, Runaan's Hurricane, and Titanic Hydra. When Zeri included at least these three pieces in their build, they performed significantly better versus Janna than with many other commonly used builds. In fact, Zeri boasted an average win rate of 43.8% when countering Janna with this build.
To have the highest likelihood of vanquishing Janna as Zeri, you should use the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Conditioning, and Overgrowth runes from the Precision and Resolve rune sets. Out of all the rune builds players chose for Zeri vs Janna clashes, this sequence of runes yielded the greatest win rate. Moreover, these runes gave a 43.8% win rate overall.
By default, tips, stats, and builds on how to beat Janna as Zeri are presented for all skill levels, merged. If you want to filter the statistics and builds to a particular player tier, you should use the selection menu located at the top of this page.