Co-directors Anthony and Joe Russo tease one of the biggest one-on-one fights fans are waiting for. A new behind-the-scenes photo from the set of "Captain America: Civil War" features Black Panther (Chadwick Boseman) and the Winter Soldier (Sebastian Stan) locked in combat, as the directors look on and offer advice.

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Working out choreography for the dance scene. A photo posted by The Russo Brothers (@therussobrothers) on

Directed by Joe and Anthony Russo and starring Chris Evans, Robert Downey Jr., Scarlett Johansson, Anthony Mackie, Sebastian Stan and more, "Captain America: Civil War" opens on May 6, 2016.