Picking up Daggers will significantly reduce Shunpo's cooldown.
Try waiting until the other team is distracted with fighting your team, and use Shunpo to teleport into the fray and unleash a devastating Death Lotus.
Using Shunpo on an allied Champion, Dagger, or minion can be a great escape tactic.
Stay behind minions to make Charm difficult to land, this will reduce Ahri's damage potential significantly.
Ahri's survivability is dramatically reduced when her Ultimate, Spirit Rush, is down.
The stat comparisons provided here show several strategic Katarina against Ahri matchup stats that can help you grasp the differences between the two. Katarina’s KDA ratio ([kills + assists] / deaths) of NaN is better than Ahri’s ratio of NaN, highlighting that Katarina may be more central to her team's team fighting effectiveness than Ahri. This observation is in large part a result of the difference in kills.
Katarina often has a much larger longest kill spree than her opponent does. Typically, she receives more damage than Ahri. This is usually reflective of different amounts of tankyness, yet it can also illustrate that the one champion has less mobility and thus is unable to kite away from additional harm when engaged or poked.
Both League of Legends champions are great. Both have their pros and cons. In League's current meta, Katarina usually wins when trying to fight Ahri, with a 52.4% win rate. Therefore, Katarina makes a good counter for Ahri.
While Katarina does have a higher win rate than Ahri, when they face off with one another, Katarina also has a much greater learning curve that makes her a more difficult character to pick up and master. You should be be fine when picking Katarina into Ahrias her relative depth means you may not be able to reach her full potential without a lot of practice beforehand.
Moreover, Katarina has only a small amount of utility and CC, a similar amount to Ahri. This makes her just as valuable during team fights, especially when fighting champions with a ton of burst damage.
While there isn't a single best champion in League of Legends, in Katarina vs Ahri matchups, Katarina is the better champion with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your team members during late stage team fights.
Katarina is an above average counter for Ahri. You will do well by focussing your play on maximizing your gold income and taking out objectives. If you can do that, you should be able to stand on your own as Katarina against Ahri.
If you would like to learn all of the intricacies of Katarina to counter Ahri during both the lane and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tricks and insights into this matchup. If you pay attention to the build and stats shown above, you will grow your win rate by a lot and be that much closer to League of Legends pro players.
Katarina typically accumulates a similar amount of CS compared to Ahri. Champs who typically don't get much CS often don't have to have much CS to be valuable teammates, such as support champions. They are able to scale properly off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually have to have several high cost items to be effective. In either case, try to do better than the values shown here to do well.
The most important items to use in your Katarina versus Ahri build consist of Rabadon's Deathcap, Nashor's Tooth, and Stormsurge. When Katarina bought at least these three pieces in her build, she did a lot better vs. Ahri than with many other typical builds. In fact, Katarina had an average win rate of 52.4% battling Ahri with these items in her kit.
To have the best chance of coming out on top against Ahri as Katarina, you should use the Conqueror, Triumph, Legend: Tenacity, Last Stand, Relentless Hunter, and Sudden Impact runes from the Precision and Domination rune sets. Out of all the runes players used for Katarina vs Ahri clashes, this sequence of runes resulted in the highest win rate. Moreover, these runes gave a 52.4% win rate overall.
By default, tips, statistics, and builds on how to beat Ahri as Katarina are given for all ranked divisions combined. If you would like to narrow the stats and builds to a specific rank, you should use the selection menu located earlier in the counter matchup guide.