South Korea player Jongwoo Park has been banned for two international matches by FIFA after he displayed a political banner during the Olympics.
World football's governing body has also given the Korean FA a warning following the incident.
Park celebrated at the end of his side's bronze medal win over Japan by waving a banner supporting the sovereignty of a group of islands over which the two countries are in dispute.
FIFA imposed the ban for "unsporting behaviour" and fined him 3,000 Swiss francs, saying in a statement: "The committee considered it appropriate to also impose a warning on the Korea Football Association and reminded it of its obligation to properly instruct its players on all the pertinent rules and applicable regulations.
"Should incidents of such nature occur again in the future, the FIFA disciplinary committee may impose harsher sanctions on the Korea FA."
Information from the Press Association was used in this report