Oli McBurnie has spoken about the lengths Chris Wilder and the Blades went to in the summer to secure his signature at Bramall Lane.
Speaking with local media recently, the Scottish international commented: "One of the main factors of wanting to come here was because I knew the Gaffer rated me and how much he liked me.
"We do opposition analysis on the other teams and the boys have since told me what the Gaffer had said when I was playing for Swansea against Sheffield United!
"It was something like, he might look like Shaggy off Scooby Doo but the boy can play and ever since we first played them (when I scored at Bramall Lane on the opening day), he's had his eye on me and made his interest know in me, how much he rated me as a player and appreciated me as a person as well.
"Having someone who would wait for you as long as it took to get you is a real confident booster, knowing that you have a manager that rates you so much as a player. When I did come, I wanted to repay the faith and keep doing that as much as I can.
"I think it was the last game they lost until we got beaten at Manchester City in December. I seemed to do really well against Sheffield United whenever I played against them. I scored when I played against them with Barnsley and then both times I played against them with Swansea too."
McBurnie continued: "I think they (United) were sick of the sight of me, but it worked out in the end with the Gaffer rating me and then making the move happen.
"I never really enjoyed it too much, playing against the Blades, if I'm being honest, apart from the scoring side of it, but it was always tough.
"Everyone knows what Jack (O'Connell) is like, he's a nightmare to play against, John (Egan) doesn't give you a yard, everyone knows that and Bash is Bash, he uses his snake hips to get past you, so you're not going to get much of a sniff against those three.
"You have to take your chances when they come, and I was lucky enough to do that when I played against them. It definitely wasn't my favourite game of the season, I always knew it was going to be a really tough 90 minutes."