Burnley had the better of the rest of the first half, but Watford came out racing in the second half too, with stunning goals from Troy Deeney and Will Hughes inside the first four minutes to give the Hornets a comfortable lead.
Check out our breakdown of the game below.
Key Talking Point
It is so uncharacteristic of Burnley to see defensive mistakes and sloppy possession, yet that was exactly what those inside Turf Moor witnessed at times during this match. Especially just after the half-time interval.
Burnley seemed to continually give the ball away to Watford, causing many of their own problems and letting a clinical Javi Gracia side punish them on the break. Those in claret and blue just couldn't cope with Watford's intensity.
Sean Dyche will no doubt have been left enraged by the performance, especially after having done so well to come back from behind and reassert control in the first half.
Starting XI: Hart (5), Lowton (4), Tarkowski (7), Mee (6), Ward (5), Lennon (6), Cork (5), Westwood (5), Berg Gudmundsson (5), Hendrick (6), Wood (5).
Substitutes: Barnes (6), Vokes (7), Taylor (6).
STAR MAN - James Tarkowski planted Burnley firmly back into the match after just six minutes when he rose unchallenged from a corner to net an equalising goal - his first ever Clarets strike - and didn't do much wrong from then on out.
Unfortunately for Tarkowski, his defensive teammates around him, particularly in the wide areas, did and Watford's significant counterattacking forces simply overran him.
TARKYYYYYYY!!!!!! ❤ Well done on your 1st goal lad!! #twitterclarets— Lauren Rigby (@LElizabeth91) August 19, 2018
WORST PLAYER - Matt Lowton likely wins the award for the worst performer for Burnley, not just because of the shocking pass that gifted Will Hughes his goal, but also for the sheer change in performance from first to second half - where he went from firing in dangerous crosses from deep to gifting the ball away on multiple occasions.
He also may face retrospective action for a foolish incident with Isaac Success late in the match, when he appeared to intentionally step on the Watford forward's fingers.
Key Talking Point
What a start Watford have had to their Premier League campaign in the opening two games, and based on their performance against Burnley it's not hard to see why.
Gracia's men were quick and intense right from the first whistle, taking their chances and hitting Burnley with goals early in both halves before soaking up pressure as their opponents were forced to chase the game.
It was a confident performance, especially in the second half, and whatever team talk Gracia had at half time certainly inspired a reaction.
Starting XI: Foster (8), Janmaat (6), Kabasele (6), Cathcart (6), Holebas (7), Doucoure (7), Capoue (6), Hughes (8), Pereyra (7), Deeney (8), Gray (8)
Substitutes: Sema (7), Femenia (n/a), Success (n/a)
STAR MAN - Troy Deeney was a key figure for Watford once again in the match, as he drove his teammates forward and lead by example.
The Watford captain was consistent throughout the game, providing an assist for Gray's early goal against his former club, before netting his own goal early in the second half. He almost added a second late on after Joe Hart fumbled, just prior to being substituted.
I have to say I like Troy Deeney. Intelligent player and good leader on the pitch.— Isaiah Rice gbsct (@IsaiahLRice) August 19, 2018
WORST PLAYER - There were no bad performers in the second half for Watford, so as bizarre as it might sound, Will Hughes is arguably their worst - and equally one of their best - performers for this match.
He might have scored a thunderbolt in the second half and performed very well, but throughout the first half he was poor. He did little beyond kicking and fouling the Burnley players.
Watford face a home clash against Crystal Palace in their next match, as they look to continue their impressive start to the season that has seen maximum points picked up - with five goals scored and only one conceded.
Burnley, meanwhile, face another midweek European exploit against Olympiacos of Greece, before returning to England to face newly promoted Fulham at Craven Cottage.