What is mejores arbitros del mundo?

As an AI language model, I don't have personal opinions, but I can provide some general information about the best referees in the world.

The title of "best referees in the world" is subjective and can vary depending on who you ask. However, several referees have consistently ranked among the top-rated officials in international football. These include:

1. Pierluigi Collina (Italy): Considered by many to be the best referee of all time, Collina officiated some of the biggest matches in football history, including the 2002 World Cup final.

2. Howard Webb (England): Webb was a highly respected referee who officiated the finals of both the World Cup and Champions League.

3. Ravshan Irmatov (Uzbekistan): Irmatov has been consistently ranked among the best referees in recent years and was awarded the title of "best referee in the world" by the International Federation of Football History and Statistics in 2013.

4. Mark Clattenburg (England): Clattenburg was one of the most respected referees in the English Premier League and also officiated several high-profile matches at the international level.

5. Bjorn Kuipers (Netherlands): Kuipers is widely regarded as one of the best referees in the world and officiated the 2013 Champions League final.

Overall, the title of "best referee in the world" is subjective and can vary depending on personal opinions and different criteria. However, these individuals are some of the most respected and highly rated officials in the game of football.