Billy Sharp scored from the penalty spot as Sheffield United made their dominance count by beating Bristol City 1-0 in the FA Cup fifth round.
Jayden Bogle saw a shot clip the top of the crossbar but that was the closest they came to a goal and the first half ended 0-0 at Bramall Lane.
United continued their dominance in the second half and eventually got their goal through a Sharp spot-kick.
Centre-back Alfie Mawson was sent off in the process, with the ball striking him on the hand.
United now advance to the quarter-finals of the FA Cup.