Match ends, Sheffield Wednesday 1, Watford 4.
Troy Deeney scored twice for Watford as his side recorded their first away victory since October against Sheffield Wednesday in the Championship.
Gabriele Angella opened the scoring for the away side after just five minutes, tapping home from close range.
Lewis McGugan extended the lead with a header before Deeney struck twice in the space of two second-half minutes.
On-loan striker Benik Afobe headed a consolation goal for the hosts, who had won their previous four home games.
The Owls were without head coach Stuart Gray, who was attending his son's wedding.
But counterpart Giuseppe Sannino was able to inspire his side to their first win in three league games and first away win in 15 attempts.
The Hornets went ahead early on as McGugan headed down a free-kick that was initially saved by goalkeeper Chris Kirkland, before defender Angella slotted home the loose ball for his seventh goal of the season.
Midfielder McGugan extended the visitors' lead after 23 minutes, heading home Daniel Pudil's cross.
The game was over soon after the interval as frontman Deeney netted his first by calmly slotting the ball past Kirkland, before tapping home a minute later after Mathias Ranegie's shot came back off the post.
Owls youngster Afobe, on loan from Arsenal, powered a header past Manuel Almunia from Liam Palmer's cross just three minutes later and American defender Oguchi Onyewu hit the crossbar with another header late on, but the visitors' lead was never threatened.
Sheffield Wednesday coach John Deehan: "We've just had a chat in the dressing room between all of us and we've had some very strong opinions.
"Football players don't like getting beaten in games and they don't like getting beaten in the manner they did today.
"The performance fell below the level we've been performing at before."
Watford manager Giuseppe Sannino: "It's a long time since Watford have won away; too many losses and too many draws. I'm very happy for our fans and our players.
"The confidence grew during the game because we were able to pass the ball and move the ball better than in the past."
- 18MaguireSubstituted forNuhiuat 64'minutes
- 20LeeBooked at 71mins
- 28AfobeSubstituted forJohnsonat 79'minutes
- 17HelanSubstituted forLaveryat 74'minutes
- 21AnyaSubstituted forFaraoniat 79'minutes
- 18PudilBooked at 42minsSubstituted forRieraat 62'minutes
- 4AngellaBooked at 38mins
- 28TözsérBooked at 56mins
- 10McGuganSubstituted forAbdiat 70'minutes
- Mark Heywood
- Shots on Target
Second Half ends, Sheffield Wednesday 1, Watford 4.
Corner, Sheffield Wednesday. Conceded by Manuel Almunia.
Attempt saved. Kieran Lee (Sheffield Wednesday) right footed shot from the left side of the six yard box is saved in the bottom left corner. Assisted by Leon Best.
Attempt missed. Jermaine Johnson (Sheffield Wednesday) right footed shot from more than 35 yards misses to the right.
Chris Kirkland (Sheffield Wednesday) wins a free kick in the defensive half.
Foul by Troy Deeney (Watford).
Attempt saved. Atdhe Nuhiu (Sheffield Wednesday) header from the centre of the box is saved in the top left corner. Assisted by Joe Mattock with a cross.
Atdhe Nuhiu (Sheffield Wednesday) wins a free kick on the right wing.
Foul by Albert Riera (Watford).
Attempt blocked. Troy Deeney (Watford) right footed shot from the centre of the box is blocked.
Oguchi Onyewu (Sheffield Wednesday) hits the bar with a header from the centre of the box. Assisted by Chris Kirkland following a set piece situation.
Jermaine Johnson (Sheffield Wednesday) wins a free kick in the defensive half.
Foul by Almen Abdi (Watford).
Foul by Caolan Lavery (Sheffield Wednesday).
Marco Davide Faraoni (Watford) wins a free kick in the defensive half.
Corner, Sheffield Wednesday. Conceded by Albert Riera.
Attempt blocked. Troy Deeney (Watford) right footed shot from outside the box is blocked. Assisted by Marco Davide Faraoni.
Substitution, Sheffield Wednesday. Jermaine Johnson replaces Benik Afobe.
Substitution, Watford. Marco Davide Faraoni replaces Ikechi Anya.