Erik ten Hag made a convincing case to be spared the sack as Manchester United upset Manchester City to take the FA Cup with a shock 2-1 victory in Saturday’s final.
Garnacho, 19, was the first teenager to score in the FA Cup final since Cristiano Ronaldo for United against Millwall 20 years ago.
Just nine minutes later, the 19-year-old Mainoo punished more sloppy City defending.
Garnacho advanced unchecked down the right wing and found Fernandes, whose superb first-time pass reached the unmarked Mainoo for a clinical close-range finish.
City pushed harder after the interval but although Doku’s shot slipped through Onana’s grasp to set up a tense finale, it wasn’t enough to deny United.
Ten Hag was reportedly set to be dismissed regardless of the result at Wembley after a troubled campaign that even the United manager described as “terrible” this week.
But United’s hierarchy might be having second thoughts after Ten Hag’s tactical masterclass ruined City’s history bid.
City were hot favourites to win a second successive Premier League and FA Cup double.
Yet Ten Hag found a way to neutralise Pep Guardiola’s side as first half goals from Alejandro Garnacho and Kobbie Mainoo put United on course to win the FA Cup for the first time in eight years.
Jeremy Doku squeezed an 87th minute strike past Andre Onana’s weak attempted save but it was too late to rescue City.
Having ended a turbulent season on a high note, if Ten Hag’s two-year reign does end, his exit would provoke memories of fellow Dutchman Louis van Gaal’s Old Trafford departure.
Van Gaal was fired just two days after United’s FA Cup final victory against Crystal Palace in 2016.
Ten Hag will hope a more apt comparison is Alex Ferguson’s 1990 FA Cup final win against Palace, which kick-started his remarkable run after calls for his sacking earlier that season.
Ferguson was in attendance as a match labelled Ten Hag’s funeral turned into a triumph for the much-maligned Dutchman.