Dueling Riposte 
Feat 8FighterSource Core Rulebook pg. 149 2.0Archetype Duelist*
Prerequisites Dueling Parry (Fighter)Requirements You are benefiting from Dueling Parry.
Trigger A creature within your reach critically fails a Strike against you.
* This archetype offers Dueling Riposte at a different level than displayed here.
You riposte against your flailing enemy. Make a melee Strike against or attempt to Disarm the triggering creature.
Archetype Use
This feat can be used for one or more Archetypes in addition to the listed Classes. When selected this way, the feat is not considered to have its class traits.
Dueling Riposte Leads To...
Guiding Riposte,
Improved Dueling Riposte,
Reflecting Riposte