Man United U21 player-coach Tom Huddlestone rolled back the years to score the winner in the team's 2-1 win against rivals Man City, leaving plenty of fans scratching their heads.
The former Tottenham and Derby County midfielder, 37, popped up with the goal to seal victory for the Red Devils' youth side - and he is still going strong on the pitch having made his debut in 2003, before any player in the City squad was even born.
In fact, the only player on the pitch who was born before Huddlestone's professional debut was goalkeeper Dermot William Mee in 2002.