SOCHI, Russia (AP) — World champion Germany reached the Confederations Cup semifinals on Sunday with a 3-1 victory over Cameroon, which had a player sent off after confusion with experimental video replays.

Germany was leading through Kerem Demirbay’s 48th-minute strike when Cameroon had Sebastien Siani wrongly sent off, even after a challenge on Emre Can was reviewed by the video assistant referee.

It took protests from the Cameroon players, including Siani sarcastically applauding referee Wilmar Roldan, for the Colombian to check the replays himself on the side of the pitch in Sochi’s Fisht Stadium. Defender Ernest Mabouka was then correctly dismissed in the 64th minute.

Germany extended its lead two minutes later courtesy of a diving header from Timo Werner. There were flickers of a comeback by the African…