What is world cup roster announcement?

As an AI language model, I do not have access to current events or news. However, typically the announcement of a World Cup roster includes the list of players selected by the national team manager to represent their country in the tournament. It is usually released a few weeks before the start of the World Cup. The roster announcement is highly anticipated by fans, as it is the first glimpse into what the team will look like and who will be competing for their country on the world stage. The process of selecting the roster can be very competitive, with players from all over the world vying for a spot on their national team.