Danny Wilson is happy with Nick Blackman's unconventional style of taking penalties and isn't worried about him getting caught out by the opposition.
Blackman has an eye-catching stutter-step in his run up, but with his summer recruit having a 100 per cent record from the spot to date in United colours - all of them coming at the Kop end of Bramall Lane - Wilson isn't even considering the striker missing.
The Gaffer said: "There is nothing perfect about anything because something could always be waiting around the corner.
"Nick has a high percentage of scoring penalties whether that is in training or, more importantly, in game situations.
"Credit to him, you have to commend his technique. It is difficult for goalkeepers because he has one eye on them and the ball isn't moving so he knows where he wants to put it.
"We aren't worried about him missing because he is such a confident lad, but we have other good penalty takers at the club, Tony McMahon to name just one."