Sheffield United striker Billy Sharp has sent a message to the “mindless idiot” who apparently attacked him as Nottingham Forest fans spilled onto the pitch at the end of the Sky Bet Championship play-off semi-final.

Sheffield United boss Paul Heckingbottom revealed Billy Sharp required stitches after being “attacked”.

A man has been arrested on suspicion of assault after footage appeared to show a fan headbutt the striker after Forest’s Wembley spot was confirmed.

Nottinghamshire Police’s chief inspector Paul Hennessy said: “A 31-year-old man has been arrested on suspicion of assault in connection with this incident. He remains in custody and will be questioned by officers.

“Our enquiries into the circumstances surrounding the incident are ongoing. We have spoken to the player concerned and we are working with both clubs who are supporting us with our investigation.”

Billy Sharp breaks silence on alleged ‘headbutt’

The Blades captain was sidelined for the second leg because of injury and was stood on the touchline after Forest secured a dramatic 3-2 penalty shootout victory following a 3-3 aggregate draw, which precipitated a pitch invasion at the City Ground.

Footage shared on social media appears to show one supporter running at the 36-year-old former Forest striker and knocking him to the ground.

Sharp called the man a “scumbag” who “ruined an unbelievable night of football”.

Posting on Twitter on Wednesday morning, the 36-year-old 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 the 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.”

Forest have condemned the incident and said in a statement they will “will work with the authorities to locate the individual” and the offender will be subject to “a life ban” from the club.