World Cup assistant referees have been told to keep their flag down for tight offside calls to enable VAR to make the correct decision, says Fifa referees committee chairman Pierluigi Collina.
Russia 2018 will be the first World Cup to use the video assistant referee system.
“If you see some assistant referee not raising the flag it’s not because he’s making mistakes,” said Collina.
“It’s because he’s respected the instruction to keep the flag down.”
Italian former referee Collina was speaking at the World Cup referees media briefing on Tuesday.