The beautiful game would be very ugly if offside didn't exist. At the World Cup you'll see it often.

Soccer, otherwise known as football, is a relatively simple sport. Eleven players play on each team who, aside from the goalkeeper, can't touch the ball with their hands and must put the ball in the ...

World Cup soccer is back again, which means one of the most controversial calls in sports is returning, as well. The offside rule has caused some of the most frustrating moments ever in soccer and is ...

Learn World Cup football rules fast with simple explanations of offside, stoppage time, free kicks vs penalties, tiebreakers, ...

The Women’s World Cup is back again, which means one of the most controversial calls in sports has also returned. The offside rule has caused some of the most frustrating moments ever in soccer and is ...

The flag is up! We explain what that means and why one of soccer's most important rules is also one of the toughest to see live.

This article may have Spanish-language video from our Telemundo sister station. Get the latest World Cup news in Spanish from Telemundo. NBC Universal, Inc. The Women’s World Cup is back again, which ...