Danny Wilson declared Saturday's FA Cup third round victory at Oxford United as a job well done.
United were 3-0 winners at the Kassam Stadium, with goals from Tony McMahon, Dave Kitson and Nick Blackman securing the Blades a berth is Sunday's fourth round draw.
On the victory, Wilson said: "It was a great cup performance away from home, in what was, on paper a very tricky tie.
"We defended brilliantly in the first half, we stood up to everything Oxford threw at us and they couldn't get in behind us."
Analysing his team's three goals, the Gaffer continued: "The first goal was another excellent free-kick from Tony (McMahon) and it was won by a good run from Jamie (Murphy).
"Jamie proved what a strong runner he is with the ball at his feet and that is a key reason we wanted to bring him here.
"That gave us a foot hold in the game and for the second goal we saw another excellent delivery from Ryan (Flynn).
"It was right in the danger zone and Dave (Kitson) got on the end of it to give us that breathing space.
"For the third it was an excellent move, Kevin (McDonald) has played through a fantastic ball and what a finish by Nick (Blackman), to cap a superb afternoon."
The one blemish on an otherwise perfect away trip was a potential serious facial injury to Matt Hill.
Wilson admits he is concerned about the possible extent of the injury, but said it was too early for a full prognosis:
"Matt took a whack to the face and we are fearful about his jaw, but hopefully it isn't too serious.
"Marcus (Williams) covered really well and we are hopeful Matt won't be sidelined for to long, although he blanked out and was groggy, so that is a concern."
*United will be ball number 19 in Sunday's draw at Wembley, which will be televised on ITV1 at 3.30pm.
As a result of the Blades progression to the fourth round, the home clash with Crawley Town, scheduled to be played on Saturday 26 January 2013, will be rearranged in due course.