It is a crying shame when you witness a great individual fall from their well earned position at the summit of the mountain top.
United conceded because of a lack of physical urgency from its defenders, but the problems run deeper than just the two goals that were given away in this game.
During the match it was clear to see how Vidic struggled with his mobility, and if you are the player that has to organise and execute, you must lead by example.
Vidic's failing physical game has been matched by that of Patrice Evra. The Frenchman still has his uses when going forward, but appears to be running in slow motion when retreating into his left-back position.
Both Vidic and Evra have been fantastic servants to Man Utd, but their time is up. It happens to the best of footballers.
Evans is himself a leader, and a great organisational force for the Red Devils. However, in Vidic's presence he reneges this responsibility by default and his own game is fundamentally compromised.
Whilst partnering either Chris Smalling or Phil Jones, Evans comes to life. He takes control and his partners listen to him.
Even with these three young defenders at their disposal, there is still the feeling that United need a physical entity to replace Vidic.
With the January transfer window now open, United are well placed to address this huge hole at the heart of their engine room.
Eliaquim Mangala would be perfect to take over from Vidic, and has spoken of his love for the Premier League, as per The Daily Star.
Mangala is a beast of a defender, something United was clearly missing in their ranks against Spurs.
They were devoid of a player who could deal with Emmanuel Adebayor's power and movement. In the future, if Evans is to cover and organise, United need a Mangala to do the punishing work.
Of course a player of his quality will not come cheap, but if the Glazers want their football club to be in the Champions League next season, then they will have to push the financial boat out sometime in the next 30 days and not wait until the frenzy of a World Cup summer.
If Mangala or any of his contemporaries shine in Brazil during the tournament, United may well be priced out of the best talent with the most potential.
As we say goodbye to the greatness of Vidic, it is now the correct time to look to the future and bring in his successor.
Should United move to replace Vidic in January?
As Vidic himself was a clever piece of January transfer window business, it would seem fitting that his replacement was brought in under similar circumstance.