Re: That it works, don't make it good.
IMHO, a true master wouldn't necessarily hide his skill. To do so might entice his opponent into figting against what he percieves is a weaker opponent, which makes the master a big part of the problem and hence not a master.
A master is one that can leave his ego at the door, and de-escalate the fight to nothing. A master also may make his skill known to his opponent so his opponent would realize that attacking him would be futile. The master give the opponent an out in a gracious matter that does not further complicate the situation through humiliation.
Those are my thoughts....