When you say "wrestling" does it appear to be in a violent way. I have a pair of maroons that have bee together about a month now. One has definitely become bigger(female) and more dominant. They "wrestle", but never in a harmful way. The smaller one never runs or tries to hide, but often follows the other around the tank. 90% or the time they are together.
Just watch for signs of stress or one that cowers or tries to escape from the other. Maroons are known to be very aggressive and if the do not form a pair one will most likely destroy the other.
How big is your tank, and do you have a QT
where you can move one if required?