Manchester United battled back from two goals down to salvage a 2-2 draw against Leeds United but missed the chance to move level with second-placed Manchester City.
Leeds, starting life after Jesse Marsch and with Under-21 coach Michael Skubala in the dugout, took the lead after just 55 seconds through Wilfried Gnonto.
Aged 19 years and 95 days, the Italian became the youngest Premier League opposition goalscorer at Old Trafford, since Jermain Defoe's strike at 19 years and 62 days in December 2001.
The visitors also made a dream start to the second half, doubling their advantage just three minutes after the break when a cross from substitute Crysencio Summerville forced an own goal from Raphael Varane.
Leeds were heading for their first ever Premier League win at Old Trafford, but Man Utd pulled one back on 62 minutes.
Marcus Rashford's header was his 12th goal in 14 matches in all competitions since the FIFA World Cup, and made him the first Man Utd player to score in six straight Premier League home appearances since Wayne Rooney in 2012.
Substitute Jadon Sancho then equalised eight minutes later, and the hosts nearly grabbed a winner, but Illan Meslier clawed away a close-range header from Varane to end Man Utd's 13-match home winning run in all competitions.
The result leaves Man Utd third on 43 points, two points behind Man City having played an extra match.
Leeds are 16th with 19 points, one point above the relegation zone.