User blog comment:Fistful of Force/Jax: Merely meh vs Trynd?/@comment-5907289-20130204143250

Jax's main counter for Tryndamere should be Counterstrike, as Tryndamere is (almost) solely autoattack based. But as Counterstrike is so easily noticeable, Tryndamere should just go and farm while the staff is spinning and spin away himself to avoid the Leapstrike.

Also, he is fine in the jungle and if he lands his CC you're set.