Title: 2018 FIFA World Cup knockout stage
Passage: In the knockout stage, if a match was level at the end of 90 minutes of normal playing time, extra time was played (two periods of 15 minutes each), where each team was allowed to make a fourth substitution. If still tied after extra time, the match was decided by a penalty shoot-out to determine the winners.
Question: can round of 16 end in a tie
Answer: no