Rasmus Hojlund's record-breaking double was enough to earn Manchester United a tense 2-1 win at Luton - a fourth league victory in a row to take Erik ten Hag's side closer to the top four.
The 21-year-old became the youngest Premier League player to score in six straight games as he put United two up inside seven minutes - clinically finishing after 36 seconds following Amari'i Bell's mistake, before instinctively chesting in Alejandro Garnacho's shot from a corner.
Carlton Morris rounded off a scintillating opening 15 minutes by pulling one back and Luton should have levelled with several big chances - as they put United on the ropes, with Casemiro unlucky not to see red for lunging on Ross Barkley while on a booking.
United were more settled after the break - with Casemiro taken off at the interval having been fortunate not to have received a second yellow card - and should have put the game to bed as Bruno Fernandes and Garnacho both failed to score despite both rounding Luton goalkeeper Thomas Kaminski.
But despite some late Luton pressure, including Ross Barkley hitting the bar with the last kick of the game, United held on to move within three points of fifth-placed Tottenham, with a top-five spot possibly being enough for a Champions League place next season.