With Chelsea having been controversially awarded a goal in almost identical circumstances in the semi-final, Cech could not believe goalline technology was still not in place in football.
"It should've started 10 years ago," he said.
"I understand the point people are making that not everybody would have the chance - or every league have the chance - to have the same possibilities to have the video linesman.
"But, in the end, you can't compare the Premier League even with the Czech league.
"If you look around, football is actually the only sport in the world at the highest level which doesn't have that help.
"There are people thinking about it. They haven't allowed it for I don't understand what reason."