Watford have been promoted to the Premier League after beating Brighton and Hove Albion while other results went in their favour.
The Hornets eased to a 2-0 win over Chris Hughton's side at the Amex Stadium in Saturday's early afternoon kick off and watched on as rivals Middlesbrough and Norwich City dropped points.
With one game of the season remaining, Slavisa Jokanovic's side cannot be denied a top-two finish, although Bournemouth can still pip them to top spot with a game in hand.
On a pulsating afternoon of Championship football, Middlesbrough recovered from falling two goals behind only to lose 4-3 to Fulham at Craven Cottage, with Ross McCormack scoring a last minute winner for the home side.
Norwich were also spurned by late goal, settling for a draw away to Rotherham United after Jordan Bowery's header four minutes from time.
Bournemouth can virtually seal their automatic promotion spot if they can beat Bolton Wanderers on Monday ahead of the final round of fixtures on 2 May.
Watford last competed in the Premier League in the 2006/07 campaign but will return next term after an eight-year absence.