The tournament featured new substitution rules whereby teams could make up to five substitutions in normal time, and an additional substitution in extra time.[37][38][39] In addition, it was the first World Cup to feature concussion substitutions, whereby each team was permitted to use a maximum of one concussion substitute during a match. A concussion substitution did not count towards a team's quota of regular substitutions.[40] Iranian goalkeeper Alireza Beiranvand suffered a concussion in his country's opening match against England and was replaced by Hossein Hosseini. This was the first use of a dedicated concussion substitute during a World Cup.[41]