\"I think that slap was the best thing I\'ve ever done.\"
The fight is the first unification bout in the history of women\'s middleweight class.
The Irishman announced his retirement from MMA via a post on his Twitter account on Monday night.
The Triple Threat match at WrestleMania 35 is months in the making.
Angle hopes to tap out Baron Corbin on the "grandest stage of them all."