Sivir's Boomerang Blade returns to her after reaching the max range, so you can shift position to hit enemies who would otherwise have evaded it.
Try saving Spell Shield for enemy abilities that can disable you such as stuns and roots.
Ricochet resets Sivir's basic attack timer on activation, so activating this immediately after landing a normal basic attack will maximize damage output.
Kai'Sa is very vulnerable to getting outranged by mages and long range carries.
Make sure to place wards in your blind spots so you can see Kai'Sa coming.
Kai'Sa is very good at picking off isolated enemies. Stick together against her.
The stats provided here emphasize several important Sivir versus Kai'Sa matchup stats that can help you appreciate the differences between these two champs. For instance, Sivir’s KDA ratio ([kills + assists] / deaths) of NaN is more than Kai'Sa’s ratio of NaN, showing that Sivir may be more central to her team's team fighting capacity than Kai'Sa..
Sivir typically has a slightly smaller longest killing spree than her counter does. Typically, she receives a similar amount of damage to Kai'Sa. This often reflects different amounts of tankyness, but it can also imply that the champ with higher health has less mobility and thus is not able to kite away from further harm when engaged or poked.
Both LoL champs are great. Both have their pros and cons. In the game's current meta, Sivir usually wins when playing against Kai'Sa, with a 53.4% win rate. As a result, Sivir makes a great counter to Kai'Sa.
While Sivir does have a higher win rate than Kai'Sa, when they face off with one another, Sivir also has a lower learning curve that makes her a less complex champion to pick up and master. You should be be fine when picking Sivir into Kai'Sa.
Additionally, Sivir also has almost no amount of CC and other utility, a similar amount to Kai'Sa. This often makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there is not a single best champion overall in League of Legends, in Sivir vs Kai'Sa matchups, Sivir is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your allied champions during late stage team fights.
Sivir is a great counter to Kai'Sa. Make sure you focus your strategy on maximizing your gold and cs and destroying objectives. If you can do that, you should be able to stand on your own as Sivir against Kai'Sa.
To learn all of the intricacies of Sivir to counter Kai'Sa during both the laning and mid / late game phases of League of Legends, you should keep reading to pick up a few extra lessons on this matchup. If you pay attention to the build and tips shown here, you will increase your win rate by a lot and be closer to League of Legends pro players.
Sivir often gets a similar amount of CS compared to Kai'Sa. Champs who typically don't earn much CS often don't have to have much CS to be effective, such as sup champs. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, typically have to have several high cost items to be effective. In either case, try to do better than the values shown on this page to do well.
The most important items to focus on in your Sivir versus Kai'Sa build include Bloodthirster, Kraken Slayer, and Navori Quickblades. When Sivir used at least these three pieces in her build, she did a lot better vs Kai'Sa than with many other typical builds. In fact, Sivir had an average winrate of 53.4% when countering Kai'Sa with this counter build.
To have the best likelihood of vanquishing Kai'Sa as Sivir, you should equip the Lethal Tempo, Presence of Mind, Legend: Bloodline, Coup de Grace, Biscuit Delivery, and Magical Footwear runes from the Precision and Inspiration rune sets. Out of all the runes players picked for Sivir vs Kai'Sa LoL games, this composite of runes resulted in the highest win rate. Moreover, these runes gave a 53.4% win rate overall.
By default, tips, statistics, and builds on how to beat Kai'Sa as Sivir are shown for all ranked divisions. If you want to filter the statistics and builds to a specific skill level, you may use the selection menu earlier on the page.