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.
Aqua Prison is a very powerful ability with a long cooldown, take advantage of the situation if Nami misses this ability.
Tidal Wave has a very long range but travels slowly, be aware of when it is coming your way as you can move out of its path.
Try to avoid fighting an opponent affected by Tidecaller's Blessing, it lasts a short duration so waiting it out can help you greatly.
The stat comparisons provided here show several critical Sivir against Nami matchup statistics that may help us interpret the differences between these two champions. Sivir’s KDA ratio ([kills + assists] / deaths) of NaN is better than Nami’s KDA ratio of NaN, highlighting that Sivir may be more central to her team's team fighting capacity than Nami..
Sivir often has a slightly larger longest kill spree than her enemy does. Typically, she takes a similar amount of damage to Nami. This commonly reflects differing health capacities, yet it can also show that the one champ has less agility and thus is unable to kite away from additional damage when engaged or poked.
Both LoL champions are great. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Sivir usually loses when facing off against Nami, with a 44.1% win rate. Therefore, Sivir makes a poor counter for Nami.
While Sivir does have a much lower winrate compared to Nami, when facing one another, Sivir also has a lower learning curve that makes her a less challenging champion to learn and master. You should expect to face a difficult match when picking Sivir into Nami.
Furthermore, Sivir also has almost no amount of CC and other utility, a similar amount to Nami. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there isn't one best champion overall in League of Legends, in Sivir vs Nami matchups, Nami is the better champion with a much lower win rate, less champion complexity, and a similar amount of utility to help out your allied champions during teamfights.
Sivir is a bad counter for Nami. Focus your play on increasing your gold income and clearing objectives. If you do that, you should do very well as Sivir against Nami.
If you would like to truly master Sivir in order to counter Nami during both the early game and mid / late game phases of League of Legends, you should keep reading to gather a few extra tricks and insights into this matchup. If you pay attention to the build and suggestions displayed above, you will grow your win rate significantly and be closer to League of Legends pro players.
Sivir usually gets much more CS compared to Nami. Champs who typically don't get much CS often don't have to have much CS to be effective, such as sup champs. They are able to scale well off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually require several high cost items to be effective. In either situation, try to do better than the values reported here to do well.
The best items to have in your Sivir versus Nami build include Bloodthirster, Kraken Slayer, and Navori Quickblades. When Sivir combined at least these three pieces in her build, she did a lot better vs. Nami than with most other commonly used counter builds. In fact, Sivir had an average winrate of 44.1% when playing against Nami with this counter build.
To have the highest probability of beating Nami as Sivir, Sivir players 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. Of all the rune combinations players used for Sivir vs Nami face-offs, this mixture of runes yielded the greatest win rate. Moreover, these runes gave a 44.1% win rate overall.
By default, tips, statistics, and builds on how to beat Nami as Sivir are displayed for all ranked divisions. If you want to narrow the stats and builds to a distinct skill level, you can use the selection menu above.