Shah Alam OCPD Asst Comm Shafien Mamat said the 30-year-old man lodged a police report at about 4am on Sunday alleging he was hit by the men whom he believed were Malaysian football fans.
He said the man claimed he and a few friends were waiting at a bus stop near Persiaran Sukan here when the men approached him and started to create a ruckus.
ACP Shafien said the man claimed he was punched by one of the men and sustained injuries to his hand when he tried to run away.
The man received outpatient treatment at the Shah Alam Hospital.
The case has been classified as rioting.
Police are also investigating an incident where a firecracker went off during the match at the Shah Alam Stadium.
It is learned that the firecracker exploded where the Malaysian fans were seated.
ACP Shafien advised those with information on the two incidents to report to the nearest police station.
Before the match, police had advised both the Malaysian and Indonesian football fans to enjoy the match in a civil manner.
Malaysia won with striker T Thanabalan scoring the only goal of the match with a header in the 85th minute.
Malaysia will meet Thailand in the final on Tuesday.