The FA Cup final at Wembley saw Chelsea take on Arsenal for the world’s oldest cup competition.
But there was one thing missing from the Blues attire – black armbands.
The West London club announced earlier this week they would be wearing black armbands as a mark of respect after the horrific terrorist attack in Manchester on Monday.
However, as the players took to the pitch, fans were quick to notice that while the Arsenal players donned the armbands, the Chelsea players did not.
UPDATED: The BBC’s Dan Walker has tweeted to say the mistake was a genuine error, and they will be on for the second half.