FIFA opened disciplinary proceedings against Swiss players Granit Xhaka and Xherdan Shaqiri on Saturday over their pro-Kosovo goal celebrations during the 2-1 win against Serbia.

Xhaka and Shaqiri celebrated their goals by displaying the Albania national double-headed eagle symbol with their hands. All political messages or symbols in stadiums are banned by FIFA. If the football governing body concludes that the duo violated the rule, they could be banned for up to two games.

The two players trace their roots to Kosovo, a former province of Serbia that declared independence in 2008, a move that Belgrade still refuses to recognise.

Meanwhile, the Polish Football Association was fined 10,000 Swiss francs ($10,100) and given a warning by FIFA on Saturday for a banner that was deemed political and offensive, displayed during its game against Senegal on Tuesday in Moscow.