In soccer, when extra time (also known as overtime) is played, it typically consists of 30 minutes in total. This 30 minutes is divided into two halves of 15 minutes each. There is usually a short break, around 1 to 2 minutes, between these two 15-minute periods to allow players to rest, receive instructions from their coaches, and make any necessary tactical adjustments.
Extra time is often used in knockout competitions (such as the knockout stages of the FIFA World Cup, UEFA Champions League, etc.) when the score is tied at the end of the regular 90 minutes of play. If the score remains tied after the 30 minutes of extra time, a penalty shootout is then conducted to determine the winner of the match.
It's worth noting that in some competitions or special circumstances, the rules regarding extra time may vary slightly, but the 30-minute format divided into two 15-minute halves is the most common.
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