All Casper Ruud Title Opponents

In 12 minutes, try to name all the teams that compete in the MLB, NBA, NFL, and NHL. Can you name them all?

Name all the men who have been ranked as the number one singles player by the ATP.

Name the twelve countries that have the most people who speak German as their native language.

There are 16 countries with a population of at least 100 million. Click them all without clicking any incorrect countries.