Sheffield United advanced into the fourth round of the FA Cup with goals from Tony McMahon, Dave Kitson and Nick Blackman defeating Oxford United.
McMahon found the net with a first-half free kick from 20 yards before Kitson bundled home from close range.
Tom Craddock saw his near-post shot turned behind by Blades keeper George Long while Justin Richards inexplicably fired high and wide for the U's.
But Blackman sealed victory with a neat half volley four minutes from time.
VIEW FROM THE DRESSING ROOM
Oxford United manager Chris Wilder told BBC Radio Oxford:
"I wanted to show what our true colours were and we did.
"Maybe in the big moments in the game we lacked a touch of quality where they showed their class.
"I didn't think it was a free-kick for the first goal but I could talk about that all day long.
"I thought our boys caused them a few problems. We rode our luck also but we were playing against good players. We pushed them all the way and we made them have a difficult afternoon."