Leyton Orient manager Russell Slade has called for a Swindon fan who attacked goalkeeper Jamie Jones to be banned for life after the shocking incident marred his team's 3-1 win in the League One clash on Saturday.
The supporter ran on to the County Ground pitch and aimed a series of punches at stunned Orient keeper Jones midway through the second half before being dragged away by stewards.
Jones was unhurt and able to finish the match as the east London club moved back to the top of the third tier table.
But Slade was furious with the incident and said: "It was a great win but it was clouded by the fan coming on to the pitch and throwing three punches at my goalkeeper.
"It was totally unbelievable, the worst scene I have seen since I have been a manager.
"Jamie is okay but it doesn't make it right, it is outrageous. He needs a ban for life and should never go to another football match.
"He had a long time in the six-yard box before the stewards did anything."
Swindon chairman Jed McCrory apologised to Jones and vowed to ban the offender.
"We will be speaking to the police with reference to their report next week," he told the Swindon Advertiser.
"We don't condone any actions where supporters come on to the pitch and, if found guilty, he will receive a ban."