Dave Kitson returns 'home' at the weekend but he is confident the Blades have the ability to cause a cup upset at Reading.
Speaking ahead of Saturday's fourth round tie, Kitson says he has nothing but fond memories of his time in Berkshire.
The striker commented: "It is always nice to return to the Madejski because I had five fantastic years there and I still know a lot of people who have worked there for a number of years, who are good friends.
"The people behind the scenes there are the fabric of the club and I always seem to get a good reception from the fans. For the most part it was a brilliant time, I had the honour of playing my part in such an unbelievable team who had a desire to win that I had never seen before. That hunger and willingness to fight for each other, coupled with a decent level of ability was the main reason behind our promotion and record points haul.
"Some players never find that in their career and I was extremely lucky to find a club that suited me perfectly and around me I had fantastic players who all complimented each other. I was at the peak of my career so even now I know how fortunate I was to be at Reading and I look back on those years with great fondness."
Kitson joined the Royals from Cambridge United in December 2003 for £150,000 after Brian McDermott recommended the striker to then-Reading boss Steve Coppell.
The 33-year-old holds the utmost respect for McDermott and admits he has a special relationship with the former Arsenal midfielder, who in charge at the Madejski Stadium.
"I owe everything to Brian, he was the one who scouted me from Cambridge and I will never be able to repay him enough.
"He was the first person to text me when the draw was made and, to be honest, for me personally, I couldn't have asked for a better draw, than returning to the Madejski.
"I have regular contact with Brian and I am delighted he has been given an opportunity to show his ability as manager because he scouted all the players that Steve signed to ensemble the most successful team I have played in."