A football grand final has been called off after a brawl broke out between players and supporters in Melbourne's south-east.

Police were called to the Ross Street Reserve in Heatherton about 3.30pm on Saturday, where Mount Waverley was taking on Carrum Patterson Lakes in the Southern Football League division-three seniors grand final.

A police spokeswoman said supporters started heckling one of the teams as it left the ground at half-time. "A fight broke out between the players and the supporters, involving up to 20 people," she said.

One person was taken to hospital with minor injuries sustained in the brawl and the game was called off when one of the teams refused to return to the field, the spokeswoman said.

Fairfax Media has been told the free-for-all started when three Mount Waverley supporters began abusing Carrum Patterson Lakes players as they left the field.