Marcus Rashford scored a dramatic stoppage-time winner to secure a 1-0 victory for Manchester United against Hull City on Saturday.
It looked set to be a frustrating evening at the KCOM Stadium for Jose Mourinho's side before substitute Rashford tapped home in the 92nd minute after fine work by Wayne Rooney.
United had 29 shots to Hull's eight as they piled on the pressure in the second half, with Zlatan Ibrahimovic, Paul Pogba, Rooney and Rashford each going close before the latter grabbed his first goal of the season.
The win maintains United's perfect league record and keeps them second in the table, while Hull's first defeat of the campaign leaves them in fifth.
Both teams were unchanged following 2-0 league victories last weekend, but the first chance of the game fell to the visitors.
Anthony Martial drifted inside and found Ibrahimovic with a teasing cross, but the striker headed a yard over the crossbar.
Robert Snodgrass went closest for Hull midway through the half as his dipping free-kick flashed past the post with David De Gea beaten.
United took control of the match before the break, and Rooney and Ibrahimovic both had chances to break the deadlock, with the former seeing his shot cleared off the line by the impressive Curtis Davies.
Hull suffered a blow immediately after half-time when Snodgrass, who had suffered a nasty collision with the post in the first half, was unable to continue.
Mourinho introduced Henrikh Mkhitaryan and Rashford as United pushed forward in search of a breakthrough, and the pair made the difference.
The visitors had a penalty appeal turned down by referee Jon Moss when Antonio Valencia's cross appeared to strike David Meyler's arm, while Rooney and Ibrahimovic each flashed shots wide of Eldin Jakupovic's post.
Rashford drew a fine stop from the Hull 'keeper with a low effort and the Tigers rode their luck as Davies had Jakupovic to thank for preventing an own goal after his miscued clearance.
Mike Phelan's side had two chances to snatch an unlikely winner themselves, but Tom Huddlestone's long-range strike deflected wide with De Gea stranded and Meyler then blazed over.
It proved costly too, as Rooney beat Ahmed Elmohamady down United's left and teed up Rashford, who finished neatly to become the first teenager to score a Premier League goal under a Mourinho-managed side.
It sets up United for a date with rivals Man City after the international break, live on Sky Sports, while Hull must pick themselves up to face Burnley at Turf Moor.
Player ratings
Hull: Jakupovic (7), Robertson (7), Davies (8), Meyler (6), Huddlestone (6), Hernandez (6), Snodgrass (6), Clucas (7), Livermore (6), Diomande (7), Elmohamady (5)
Subs: Maloney (6), Maguire (6)
Man Utd: De Gea (6), Valencia (7), Bailly (7), Blind (7), Shaw (7), Fellaini (6), Pogba (6), Mata (7), Rooney (6), Martial (6), Ibrahimovic (6)
Subs: Rashford (8), Mkhitaryan (7), Smalling (6)
Man of the match: Marcus Rashford