I tested this in a friendly match between my Undead team, The Risen Ravagers and the TV1000 Brettonian team. My wight with Juggernaut blitzed a Brettonian blocker and chose a "both down" result, and when prompted, I chose not to use Juggernaut. It then asked if the blocker with wrestle would like to use their skill and an affirmative reply resulted in both players lying prone. I tried again and chose to use Juggernaut which resulted in a push.
Someone I know duplicated the result. It appears that Juggernaut no longer cancels the wrestle skill.