Katarina's abilities deal magic damage, so even if she's building Attack Damage items, get magic resistance to counter her.
Try to save a disable for when Katarina uses her Death Lotus.
The stat comparisons shown on this page show some significant Senna against Katarina counter statistics that may help us understand the differences and similarities between the pair. For instance, Senna’s KDA ratio ([kills + assists] / deaths) of NaN is better than Katarina’s KDA ratio of NaN, showing that Senna may be more central to her team's team fighting capability than Katarina. This observation is in large part fueled by the differences in assists.
Senna often has a significantly smaller longest kill spree than her opponent does. Typically, she receives less damage than Katarina. This is usually reflective of different amounts of tankyness, but it can also hint that the one champion has less agility and thus is unable to escape further harm when engaged or poked.
Both League champs are great. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Senna usually wins when trying to fight Katarina, with a 51.5% win rate. As a result, Senna makes a good counter to Katarina.
While Senna does have a higher win rate than Katarina, when they face off with one another, Senna also has a lower learning curve that makes her a less time consuming character to learn. You should be careful when picking Senna into Katarinaas her relative depth means you may not be able to unleash her full potential without a significant amount of practice beforehand.
Additionally, Senna has a good amount of CC and other utility, a similar amount to Katarina. This makes her just as valuable during teamfights, especially when fighting champions with a ton of burst damage.
While there is not a single best champion overall in League of Legends, in Senna vs Katarina matchups, Senna is the better champion with a higher win rate, less champion complexity, and a similar amount of utility to help out your allied champions during teamfights.
Senna is a decent counter for Katarina. You will do well by focussing your gameplay on keeping up your gold and cs and destroying objectives. If you are able to do that, you should be able to stand on your own as Senna against Katarina.
If you would like to truly master Senna in order to counter Katarina during both the laning and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tips and tricks for this matchup. If you listen to the build and stats displayed here, you should grow your win rate significantly and be closer to League of Legends pro players.
Senna usually accumulates less CS relative to Katarina. Champions who typically don't get much CS typically don't have to have much CS to be valuable teammates, such as sup champs. They are able to scale well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, typically need a lot of items to be effective. In either situation, try to surpass the values shown here to do well.
The top items to have in your Senna versus Katarina build include Rapid Firecannon, Youmuu's Ghostblade, and Edge of Night. When Senna incorporated at least these three items in her build, she did a lot better vs Katarina than with most other common counter builds. In fact, Senna boasted an average winrate of 51.5% when playing against Katarina with this counter build.
To have the greatest chance of annihilating Katarina as Senna, Senna players should equip the Fleet Footwork, Presence of Mind, Legend: Alacrity, Cut Down, Approach Velocity, and Biscuit Delivery runes from the Precision and Inspiration rune sets. Of all the rune builds players used for Senna vs Katarina counters, this blending of runes yielded the greatest win rate. In fact, these runes averaged a 51.5% winrate overall.
By default, tips, stats, and builds on how to beat Katarina as Senna are presented for all ranked divisions. If you would like to filter the statistics and builds to a specific division, you can use the selection menu at the top of this page.