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.
Kill all of Zac's bloblets when he splits apart to stop him from reforming.
Silences, stuns, roots and knockups will all interrupt Zac when he is charging Elastic Slingshot.
Zac heals from the goo that separates from him. You can crush the goo pieces by stepping on them.
The stats provided here highlight several vital Sivir vs. Zac matchup stats that can help us interpret the differences and similarities between the pair. As an example, Sivir’s KDA ratio ([kills + assists] / deaths) of NaN is more than Zac’s KDA ratio of NaN, indicating that Sivir may be more central to her team's team fighting effectiveness than Zac..
Sivir often has a similar longest kill spree as her foe does. Commonly, she takes less damage than Zac. This is usually reflective of different amounts of tankyness, yet it can also show that the one champion has less mobility and thus is not able to flee from further harm when poked or engaged.
Both LoL champs are great champions. Both have their strengths, weaknesses, and counters. In League's current meta, Sivir usually loses when taking on Zac, with a 48.3% win rate. Thus, Sivir makes a bad counter to Zac.
While Sivir does have a lower win rate than Zac, when on opposite teams, Sivir also has a much lower level of difficulty that makes her a less complex champion to learn. You still need to be cautious when picking Sivir into Zac.
Furthermore, Sivir also has only a small amount of utility and CC, a similar amount to Zac. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there is not a single best champion in League of Legends, in Sivir vs Zac matchups, Zac is the better champion with a lower win rate, less champion complexity, and a similar amount of utility to help out your teammates during late stage team fights.
Sivir is a somewhat poor counter for Zac. Make sure you focus your play on maximizing your gold and cs and taking out objectives. If you do that, you should hold your own as Sivir against Zac.
To learn all of the intricacies of Sivir to counter Zac during both the early game and mid / late game phases of League of Legends, you should continue reading to learn a few extra lessons on this matchup. If you listen to the build and suggestions shown above, you will grow your win rate by a lot and be that much closer to League of Legends pro players.
Sivir typically gets much more CS as Zac. Champions who on average don't acquire much CS typically don't require much CS to be valuable teammates, such as sup champs. They are able to scale properly off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often need several high cost items to be effective. In either case, try to exceed the values reported on this page to do well.
The most important items to have in your Sivir versus Zac build include Bloodthirster, Kraken Slayer, and Navori Quickblades. When Sivir used at least these three items in her build, she performed much better when facing Zac than with many other common builds. In fact, Sivir had an average win rate of 48.3% when playing against Zac with these items in her kit.
To have the best likelihood of vanquishing Zac as Sivir, you should use 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 rune builds players picked for Sivir vs Zac battles, this composite of runes resulted in the best win rate. Moreover, these runes averaged a 48.3% winrate overall.
By default, tips, statistics, and builds on how to beat Zac as Sivir are displayed for all skill levels, merged. To scope the statistics and builds to an individual rank, you should use the selection menu located above.