Infinite Duress (R)'s distance scales with any Move Speed you gain, even from ally buffs and summoner spells.
Follow your Blood Hunt trails to low health enemy champions.
Jaws of the Beast (Q) will follow enemies who run, dash or teleport if you keep the button held down.
Try to engage him in short bursts instead of going toe-to-toe with him. Preventing him from attacking consecutively drastically lowers his damage output.
Jax can dodge all incoming attacks for a very short amount of time and stuns enemies in melee range when it ends. Wait to strike him until after his dodge is finished.
The stat comparisons shown on this page feature several significant Warwick vs. Jax counter statistics that may help you explain the distinctions between these two champs. As an example, Warwick’s KDA ratio ([kills + assists] / deaths) of NaN is better than Jax’s ratio of NaN, indicating that Warwick may be more central to his team's team fighting effectiveness than Jax..
Warwick typically has a similar longest killing spree as his foe does. Commonly, he takes more damage than Jax. This is usually reflective of different amounts of tankyness, but it can also indicate that the one champion has less agility and thus is not able to flee from additional damage when poked or engaged.
Both League champs are great champions. Both have their strengths, weaknesses, and counters. In League's current meta, Warwick usually loses when trying to fight Jax, with a 46.6% win rate. Therefore, Warwick makes a bad counter to Jax.
While Warwick does have a lower winrate than Jax, when on opposite teams, Warwick also has a lower level of difficulty that makes him a less complex character to learn and master. You should be very concerned when picking Warwick into Jax.
Additionally, Warwick has some amount of utility and CC, a similar amount to Jax. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there is not a single best champion in League of Legends, in Warwick vs Jax matchups, Jax is the better champion with a much lower win rate, less champion complexity, and a similar amount of utility to help out your team members during late stage team fights.
Warwick is a terribly counter for Jax. You will do well by focussing your actions on maximizing your gold and cs and destroying objectives. If you are able to do that, you should do very well as Warwick against Jax.
If you would like to learn all of the intricacies of Warwick to counter Jax during both the laning and mid / late game phases of League of Legends, you should continue reading to learn a few extra lessons on this matchup. If you mind the build and tips presented here, you should increase your win rate by a lot and be that much closer to League of Legends pro players.
Warwick often gets less CS relative to Jax. Champions who typically don't take much CS typically don't need much CS to be effective, such as supports. They are capable of scaling properly off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually need a lot of items to be effective. In either situation, try to do better than the numbers shown here to do well.
The most important items to have in your Warwick versus Jax build consist of Sterak's Gage, Thornmail, and Titanic Hydra. When Warwick bought at least these three pieces in his build, he performed a lot better countering Jax than with most other common item sets. In fact, Warwick had an average win rate of 46.6% when countering Jax with these items in his kit.
To have the best probability of defeating Jax as Warwick, Warwick players should use the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Magical Footwear, and Cosmic Insight runes from the Precision and Inspiration rune sets. Of all the rune builds players chose for Warwick vs Jax counters, this set of runes resulted in the best win rate. In fact, these runes provided a 46.6% win rate overall.
If you want to see Warwick x Jax tips and builds for a a distinct rank, feel free to choose one from the selection menu provided above. If viewing for the first time, the stats and strategies shown are computed using every round finished with these champs.