Max Sterling and Miriya locked in combat in the Arena (Robotech 10)
The "Arena" was a name given to a type of place featured in Zentraedi culture. The place was referred to as being unique from Audience Chambers and Senate Forums for being places where individuals would fight over grudges, territorial disputes and rivalries.
Max Sterling and Miriya battled in an Arena when the former was held captive on the Zentraedi Flagship, which ended when Miriya threw Max out of the ship into space.(Robotech 10)