Goalkeepers who move forward off their line when a penalty is taken must be given yellow cards and spot-kicks retaken even during a shootout, UEFA's chief refereeing officer Pierluigi Collina said on Friday.
Collina, a former World Cup final referee, told reporters that the standard of officiating at Euro 2016 had been excellent with referees benefiting from a new pre-match analysis of team tactics and players that gives them extra insight.
He acknowledged, however, that there had been at least one big mistake in the group stages during the Croatia v Spain match when Croatia keeper Danijel Subasic saved a penalty after advancing well off his line to stop the shot.
"The keeper moved forward. It was not spotted by the referee's team. It was a mistake. Unfortunately it happens, but it was a mistake within a match that was refereed well," Collina said.
He said the tournament's remaining 12 refereeing teams had debriefed on Friday ahead of the knockout phases and among the topics discussed was keepers moving off their line.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Collina, the most distinctive and famous referee of modern times, remembered for his piercing blue eyes and bald head, said the issue was not a trend, but had to be stopped.
"Referees should pay attention that the penalty kicks are taken correctly," Collina said.
"It should be retaken ... (and) whenever the goalkeeper infringes, he will be cautioned," he said, adding that it should also apply during penalty shootouts.
