A former soldier kicked a Ryder Cup security manager in the groin from behind on the day of the 2014 opening ceremony at Gleneagles.
Harry Lawrence, 52, ran and volleyed James Storer between the legs during an altercation within car park 2 at the Gleneagles site.
Mr Storer, who was part of the managerial team running security deployment for the Ryder Cup, told Perth Sheriff Court that it was the worst pain he had ever felt in his life.
Lawrence and his brother Steve Lawrence, 47, were standing trial at Perth Sheriff Court facing charges they assaulted other men at the Ryder Cup site on the day it was officially opened.
Steve Lawrence, Bogside Road, Blairgowrie, was cleared of all charges, while Harry Lawrence pled guilty to assaulting James Storer by kicking him on the body at Car Park 2, Ryder Cup, Orchil Road, Auchterarder, on September 25 2014.
Security supervisor Michael Sharkey told the court that he and Mr Storer were cutting through the car park towards the staff area for their evening meal when they came across a number of males blocking a vehicle entrance to car park 2.
He said: “They seemed intoxicated. They were loud and there seemed to be some sort of argument taking place about army stuff.
“There were a number of men wearing polo shirts with an army emblem. When my colleague Jamie said that he was ex-army things turned sour.”
Mr Sharkey said the man he was speaking to, whom he could not identify in court, became aggressive.
He said: “I was pressed against a car and he was in my face. He became terribly abusive and struck me to the left hand side of my face.”
Mr Storer intervened and, after tripping over steel matting, ended up on the ground on top of the man.
Mr Sharkey stated that he then became embroiled with Harry Lawrence and the two also ended up on the ground.
He continued: “He was shouting and bawling about his bracelet. He got up and ran towards my colleague Jamie Storer. He kicked Jamie between the legs.”
Mr Storer said: “I felt the worst pain I have ever felt in my life. I realised someone had kicked me from behind between my legs.
“I turned round to see Mr Lawrence on top of me. It was an absolute cheap shot.”
Under cross-examination Mr Storer was accused of causing the altercation by using the derogatory term Stab, a term of abuse for a member of the Territorial Army, which he denied.
Solicitor Robert Hunter said that his client, who had been in the army for 25 years and left with the rank of Sergeant Major, only realised the extent of his actions when he heard the evidence in court.
Sheriff Fiona Tait ordered Lawrence, Moncrieff Way, Cupar, to pay a compensation order to Mr Storer of £400 and fined him £500.