In a knockout match, play usually goes the full 90 minutes plus stoppage time first, and if it’s still tied, it goes to 30 minutes of extra time split into two 15-minute halves.

If it’s still tied after that, the game is decided by a penalty shootout. In the shootout, each team takes five kicks; if they’re still level after that, it becomes sudden death until one team wins.

If you’re asking about a specific sport or tournament, the exact tie-break rules can vary, but this is the standard knockout format in major soccer competitions.