Rank #48
The national anthem of Poland is played at the opening and closing of the World Cup of Tennis.
This year, the World Cup of Tennis will be opening and closing with the national anthem of Poland. The anthem will be played to honor the host country and to celebrate the start and end of the tournament. All players, coaches, and spectators are encouraged to stand and show respect for the anthem
From Wikipedia
This is a list of incidents when an incorrect national anthem was accidentally played, sung or performed, including playing the anthem of the wrong country, playing an outdated anthem, and playing a non-anthem piece in place of a national anthem.