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

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 the bane of some fans’ existence. Offside is often ...

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 bane of some fans' existence. Offside is often ...

The Sporting News breaks down the offside rule, how it is enforced and why it's a part of the game.

The first game on Thursday and the last one were pretty straightforward affairs for Spain and Switzerland. But in between, Portugal and Croatia served up more drama.