PLAYER RATINGS: Leeds United 3 Burnley 1
The Ivory Coast international, who will soon head out to Cameroon, scored his sixth goal in just 10 appearances for the Clarets, which is the most by an African player in their first 10 games since Pierre-Emerick Aubameyang in April 2018.
The ex-Lyon forward, 25, drew the foul from Diego Llorente before getting to his feet and dispatching the resulting free kick past Leeds United goalkeeper Illan Meslier as Sean Dyche's side were beaten 3-1 at Elland Road.
Cornet had pulled the visitors level against Marcelo Bielsa's Whites, netting Burnley's first free kick in four years, when Steven Defour swept the ball past Manchester United stopper David De Gea at Old Trafford.
That, however, was as good as it got for the away side, who had trailed at the break after Jack Harrison punished James Tarkowski's error in the 39th minute.
The 25-year-old midfielder was denied by Wayne Hennessey with his left foot but converted the rebound with his right.
Stuart Dallas side-footed Leeds United into the lead in the 77th minute when the Clarets were slow to respond to a quickly-taken corner before substitutes Joe Gelhardt and Daniel James combined to wrap things up deep into stoppage time.
Here are the ratings.
Cornet had pulled the visitors level against Marcelo Bielsa's Whites, netting Burnley's first free kick in four years, when Steven Defour swept the ball past Manchester United stopper David De Gea at Old Trafford.
5. Ben Mee 5.5
Forced to defend for his life as those in front of him, and around him, continuously relinquished possession. Slow to the ball at times, caught out in possession, but was often called upon, as the last man, to slow United's breakaways as they countered with speed and numbers.
6. Ashley Westwood 5
Couldn't handle the intensity of the home side's press in the middle of the park and had no answer to Forshaw's influence. Wasn't given any time on the ball, unable to assert his usual grit and guile, and almost punished for a poor pass across his own backline.
7. Jack Cork 5
Over-ran in midfield, overpowered, and unable to match the home side's energy. The breaks mostly went United's way, they dominated the second balls, which allowed Klich to get on the ball and play through the lines.
8. Dwight McNeil 4.5
A botched corner routine in the first half summed up the winger's afternoon at Elland Road. Caught on his heels when retrieving the ball too many times and failed to impose himself in an attacking sense with neither Llorente/Firpo or Ayling/Dallas seriously tested.