Neither side has been able to break the deadlock as Watford and Bristol City went in level at 0-0.
In a first 20 minutes of little action, it was 17-year-old Nathaniel Chalobah who had two efforts on goal on 16 and 17 minutes; the first was blocked and the second comfortable for Tom Heaton in the Bristol goal.
Watford started to turn up the pressure, with Fernando Forestieri on 22 minutes and Mark Yeates on 23 both working Heaton.
However, City rode the pressure and could have scored themselves when Martyn Woolford tested Manuel Almunia after 34 minutes.
However, there were to be no first-half goals and the sides went in level.