Smile (even just inwardly) enjoy being there so that any stress dissolves and your brain patterns will follow your smile funny thing the body/mind it can work both ways; enjoyment, brain activity,smile, and the reverse way around to some extent. Inner control panel.

Also know when they are in range and when they are not in range so you know instinctively when they are a threat and when they are not.
So for instance you can relax your arms as you step out on an angle after making them miss you (they are committed and you are out of range).You have time to move so they have to come around even further or its time to attack and catch them as they seek your new position, either way you can do it from arms at a lower more flowing and relaxed level on the move on angles you just have know when its exactly back on and be there again.

Practice freedom in your head so it shows in your game.