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 stats shown on this page feature several important Senna vs. Nami matchup statistics that may help us interpret the differences between the pair. For instance, Senna’s KDA ratio ([kills + assists] / deaths) of NaN is better than Nami’s ratio of NaN, showing that Senna may be more central to her team's team fighting effectiveness than Nami..
Senna normally has a slightly larger longest killing spree than her matchup does. Commonly, she takes a similar amount of damage to Nami. This often reflects differing health capacities; however, it can also hint that the one champion has less agility and thus is not able to flee from additional damage when poked or engaged.
Both LoL champs are great. Both have their strengths, weaknesses, and counters. In the game's current meta, Senna usually wins when trying to fight Nami, with a 51.9% win rate. As a result, Senna makes a good counter for Nami.
While Senna does have a higher win rate compared to Nami, when on opposite teams, Senna also has a greater learning curve that makes her a more challenging champion to pick up and master. You still need to be cautious when picking Senna into Namias her relative depth means that you may not be able to unleash her full potential without a significant amount of practice beforehand.
Moreover, Senna also has a good amount of utility and CC, a similar amount to Nami. This often 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 for every situation in League of Legends, in Senna vs Nami matchups, Senna is the better champion with a higher win rate, more champion depth, and a similar amount of utility to help out your team members during late stage team fights.
Senna is a decent counter for Nami. Make sure you focus your gameplay on increasing your gold income and taking out objectives. If you do that, you should hold your own as Senna against Nami.
If you would like to truly master Senna to counter Nami during both the lane and mid / late game phases of League of Legends, you should continue reading to learn a few extra tips and tricks for this matchup. If you listen to the build and tips presented above, you will grow your win rate by a lot and be closer to League of Legends pro players.
Senna typically gets more CS relative to Nami. Champs who typically don't acquire many minion kills typically don't need much CS to be effective, such as supports. They are capable of scaling well off of their abilities and first items alone. Yet, champions 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 numbers displayed here to do well.
The most important items to prioritize in your Senna versus Nami build include Youmuu's Ghostblade, Umbral Glaive, and Voltaic Cyclosword. When Senna incorporated at least these three items in her build, she performed significantly better vs Nami than with many other typical counter builds. In fact, Senna had an average win rate of 51.9% when playing against Nami with these items in her kit.
To have the best likelihood of vanquishing Nami as Senna, you should take the Fleet Footwork, Presence of Mind, Legend: Alacrity, Cut Down, Bone Plating, and Revitalize runes from the Precision and Resolve rune sets. Of all the rune sets that we analyzed for Senna vs Nami fights, this sequence of runes resulted in the highest win rate. In fact, these runes averaged a 51.9% winrate overall.
By default, tips, stats, and builds on how to beat Nami as Senna are presented for all ranked divisions. If you want to scope the statistics and builds to a particular player tier, you may use the selection menu earlier in the counter matchup guide.