David McAllister scored United's equaliser at the Ricoh Arena on Tuesday night and admitted afterwards he was hoping to take the winning spot-kick.
Unfortunately the Blades were beaten 4-1 in the ensuing shootout following the 1-1 draw and McAllister conceded that the players were bitterly disappointed to exit the competition:
"My goal is no real consolation because we really thought this was an opportunity to progress in the Johnstone's Paint Trophy. I was pleased, at the time, to score and it is just a shame we couldn't force a winner in the 90 minutes. I enjoyed the game, you can't beat playing and hopefully I can get a run of games in the team again.
"Both games against Coventry this season have been close, which is no surprise because there are a decent side.
"It seems strange to say I felt old out there at 23, but I was particularly impressed with Joe (Ironside) and Diego (De Girolamo) when they came on.
"I was down to take the fifth penalty, I was hoping it would be the winner, but it wasn't to be."