Try to engage him in short bursts instead of going toe-to-toe with him. Preventing him from attacking consecutively drastically lowers his damage output.
Jax can dodge all incoming attacks for a very short amount of time and stuns enemies in melee range when it ends. Wait to strike him until after his dodge is finished.
The stats provided here feature several vital Senna versus Jax matchup statistics that may help you appreciate the distinctions between the pair. For instance, Senna’s KDA ratio ([kills + assists] / deaths) of NaN is better than Jax’s KDA ratio of NaN, demonstrating that Senna may be more central to her team's team fighting effectiveness than Jax. This observation is in large part a result of the differences in assists.
Senna often has a slightly smaller longest kill spree than her counter does. On average, she receives less damage than Jax. This often reflects different amounts of tankyness, but it can also hint that the champion with increased health has less mobility and thus is unable to flee from further harm when poked or engaged.
Both LoL champs are great. Both champs have their pros and cons. In League's current meta, Senna usually fairs equally well when trying to fight Jax, with a 49.8% win rate. As a result, Senna makes an ok counter to Jax.
While Senna does have a lower winrate than Jax, when on opposite teams, Senna also has a greater level of difficulty that makes her a more complex champion to learn and master. You still need to be cautious when picking Senna into Jaxas her relative depth means you may not be able to unleash her full potential without a lot of practice beforehand.
Moreover, Senna has a good amount of CC and other utility, a similar amount to Jax. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there isn't one best champion for every situation in League of Legends, in Senna vs Jax matchups, Jax is the better champion with a similar win rate, more champion depth, and a similar amount of utility to help out your allied champions during teamfights.
Senna is a somewhat poor counter for Jax. You will do well by focussing your play on maximizing your gold and cs and destroying objectives. If you do that, you should do very well as Senna against Jax.
If you would like to learn all of the intricacies of Senna in order to counter Jax during both the lane and mid / late game phases of League of Legends, you should continue reading to gather a few extra tips and tricks for this matchup. If you listen to the build and suggestions displayed here, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Senna on average accumulates less CS relative to Jax. Champions who typically don't get many minion kills usualy don't need much CS to be effective, such as supports. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually need a lot of items to be effective. In either case, try to exceed the values reported on this page to do well.
The most crucial items to focus on in your Senna versus Jax build include Youmuu's Ghostblade, Edge of Night, and The Collector. When Senna incorporated at least these three items in her build, she performed a lot better when fighting Jax than with many other typical item sets. In fact, Senna boasted an average winrate of 49.8% battling Jax with these items in her kit.
To have the best chance of vanquishing Jax as Senna, you should use the Fleet Footwork, Presence of Mind, Legend: Alacrity, Cut Down, Magical Footwear, and Approach Velocity runes from the Precision and Inspiration rune sets. Out of all the rune sets we have analyed for Senna vs Jax matchups, this sequence of runes yielded the best win rate. In fact, these runes averaged a 49.8% win rate overall.
By default, tips, stats, and builds on how to beat Jax as Senna are presented for all skill levels combined. To narrow the statistics and builds to a specific skill level, you can use the selection menu above.