Current status: Multiple teams are tied on one point at the World Cup after a surprising number of draws in the opening matches.
This has led to questions about what would happen if the sides finished level on points heading into the knockout stages of the major tournament.
Tiebreaker rule change: In previous World Cups, goal difference was used as the primary tiebreaker for those on equal points.
But now, for the first time since 1970, head-to-head records serve as the primary tiebreaker instead of overall goal difference.
What if head-to-head records don't make a difference?: If two or more teams finish equal on group-stage points and they drew against one another, goal difference again comes into play.
