Iran goalkeeper Alireza Beiranvand had to be subbed off within 20 minutes of his side's opening World Cup fixture against England after crashing into his own defender when trying to stop a Harry Kane cross from meeting Raheem Sterling.
The No.1 choice for Carlos Quieroz was down for over 10 minutes before restarting the game in a shock turnaround that drew criticism from Jermaine Jenas, but the Persepolis keeper - from the Persian Gulf Pro League - went down once more just moments after play got underway.
His departure may well spell the end of his tournament due to strict concussion protocols, but it didn't cost the Iranians a substitute due to new rules.