'Duellists' in the Bible

And there goeth out a man of the duellists from the camps of the Philistines, Goliath is his name, from Gath; his height is six cubits and a span,

And he is speaking with them, and lo, a man of the duellists is coming up, Goliath the Philistine is his name, of Gath, out of the ranks of the Philistines, and he speaketh according to those words, and David heareth;