She's gone up against Bucky exactly twice: once with everything she had and none of it anywhere near good enough, and once where he'd seemingly wanted to teleport out of the ring rather than spar with her.

So maybe it shouldn't surprise her that when she steps into range and tells herself to throw a strike, her body doesn't quite listen to her the way it usually does.

In fact, she hesitates. It's such an alien experience that she blinks at herself, bewildered, like someone who had reached to open a door and has instead found that the knob came off in their hand. It's enough of a stutter that, if it were a real fight, she'd already have lost.