The 32-year old Serbian defender will close the curtains on an eight-year Red Devils career in the summer ahead of his move to Inter Milan.
Vidic appeared at Old Trafford for the last time in a United shirt in Tuesday night's 3-1 Premier League win over Hull City and admitted there were plenty of emotions when saying goodbye to the loyal supporters after the final whistle.
"It was hard in many ways - first because it was my last game at Old Trafford, as well we didn't have a great year. I think it is the first year in my eight years that we didn't celebrate a trophy, which is hard," the former club captain told Sky Sports.
"It was a tough season and we had a tough game at Old Trafford. It was very emotional.
"I have to say that my heart will always be at this club. I have spent so many years here. I have been part of this good time at United and worked with so many great people. I will always be here and always watch United.
"I want to say a big thank you from the bottom of my heart. The fans have been fantastic to me from the first day and it was a pleasure to play for them.
"I also have to say thank you to all of the players that have played with me, the managers - especially Sir Alex (Ferguson), he was great to me - and to all the coaches and all of the staff."
Vidic joined United from Spartak Moscow in 2006 and has gone onto make 299 appearances in all competitions. He has won five Premier League titles, one Champions League trophy, a FIFA Club World Cup and three League Cups with the Red Devils.
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