Tear gas fired by police at rioting protesters outside the Olympic Stadium caused a 25-minute interruption during Panathinaikos's 3-1 win over Atromitos in the Greek Super League on Sunday.
As people clashed in Athens during a march to mark the first anniversary of the police shooting dead a teenager, officials at the soccer match ordered the two teams to leave the pitch before the start of the second half after tear gas fired by police to disperse the protesters drifted into the Olympic ground.
Despite the hold up, Panathinaikos were able to round off a comfortable win to boost their total to 32 points, just one point adrift of champions and league leaders Olympiakos, who beat Xanthi 1-0 on Saturday.
Two goals from Greece midfielder Kostas Katsouranis put Henk ten Cate's team in command before the delay. After the restart Djibril Cisse sealed the victory by drilling in the third goal.
Two policemen suffered minor injuries in clashes with dozens of youths who threw molotov cocktails and stones at police outside the Olympic stadium while the game was being played.
Last year, thousands of people took to the streets and clashed with police hours after the killing of 15-year-old Alexandros Grigoropoulos, destroying shops, attacking public buildings and burning cars, in rampages that went on for weeks.