Glasses were hurled across a bar between rival Rotherham and Sheffield football fans.
Police were called out to the Corn Law Rhymer in High Street, Rotherham just after the full-time whistle in the Miller’s 3-1 home victory against Sheffield United.
Supporters from both sides were drinking in the pub at around 5.15pm, when drinks glasses were thrown between the fans and at bystanders.
No one was reported to have been injured. South Yorkshire Police have arrested four men from Sheffield - aged 16, 17, 46 and 59 - on suspicion of affray and violent disorder.
Rotherham Chief Superintendent Jason Harwin said: “Once again the majority of supporters enjoyed the match today and behaved responsibility throughout. Unfortunately some people got involved in this incident after the game and an investigation is now underway.”
Witnesses are asked to call 101 quoting incident number 415 of September 7 or Crimestoppers anonymously on 0800 555 111.