Eeletra would beat the living hell out of Captain America. I'm talking high majority 8-9/10. She can read his every move. If she wanted she could place a scenario in Caps had where he believes he has won... and them kill him while he leaves; she has done it before. Cap has almost no chance of winning this fight... aside from a lucky hit with a ricocheting shield the chances he even hits Elektra are slim.
Has she used these telepathic powers in a fight since she's gotten them? I'm not being sarcastic, I'm honestly curious.
Only on no named Joe's. When it comes to fighting top fighters like Bullseye, Daredevil, Wolverine. There irrelevant because these fighters have a mind-set on will determination and there own martial arts abilites etc etc.
And considering that this is Captain America yeah....I don't see it working either.