Captain America (Bucky) vs. Hawkeye

Who is Steve's # 1 protege? Who wins?

Hawkeye

dur

Clint flips him out of a window.

I heard that they sparred and Bucky won?

Of course this is not strictly h2h fight, so I'm betting on Clint.

Bucky goads Hawkeye into close combat battle, HE gets annoyed and tries, Bucky owns him. Rinse and repeat.