Sharp was viciously attacked pitch-side in the wake of Forest's Championship play-off semi win on penalties last night.
A man has been arrested on suspicion of assault following the incident.
And Sharp has now had his say on social media.
The veteran said: "One mindless idiot ruined what was an unbelievable night of football.
"Congratulations to Nottingham Forest on their victory and good luck in the final.
"As an ex-Forest player I will not let one scumbag ruin my respect for Forest fans.
"Incredibly proud to be captain of this group of Sheffield United players, they gave their all and can hold their heads up high.
"We will be back and go again. Thanks for all your messages and support after the incident."
Blades boss Paul Heckingbottom said last night: "It's assault. We've seen one of our players attacked.
"He's shook up, bleeding, angry. It'll be dealt with.
“There will be something done about that. We've seen what's happened, we know what's happened. There's a prison sentence there, without a doubt.
“How can you come to a place of work minding your own business and be assaulted in that fashion?
“It's just bang out of order and it's everything that's wrong. Too many times we hear people condemn it, but nothing's done about it. We're the ones that suffered.
“It's upsetting for a lot of reasons - I don't want to say too much more about it. He'll be dealt with."
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