The Showtime series returns with a slate of undefeated prospects determined to fight for a world title, featuring light heavyweight Dmitry Bivol and welterweight Juan Ruiz in separate bouts.The Showtime series returns with a slate of undefeated prospects determined to fight for a world title, featuring light heavyweight Dmitry Bivol and welterweight Juan Ruiz in separate bouts.The Showtime series returns with a slate of undefeated prospects determined to fight for a world title, featuring light heavyweight Dmitry Bivol and welterweight Juan Ruiz in separate bouts.