Super Eagles duo of William Troost-Ekong and Maduka Okoye were unused substitutes for Watford, who held Birmingham to a 1-1 draw in Tuesday’s Championship game.
Prior to Tuesday’s game, Okoye had missed Watford’s first three league games.
For Troost-Ekong, he has made just one appearance so far this season which was as a substitute, in the 1-1 draw at West Brom early this month coming on in the 83rd minute.
Meanwhile Samuel Kalu is still recuperating from a hamstring injury.
And against Birmingham, the Hornets went a goal down after George Hall put the home team 1-0 up on 19 minutes.
And in the 63rd minute Ken Sema equalized for Watford to earn them a share of the spoils.
And after four league fixtures, Watford are yet to taste defeat, recording two wins and two draws.
They are in third place on eight points, just a point behind leaders Blackburn Rovers in the league table.