SOCHI, Russia — Germany, the World Cup champion, joined Chile, Mexico and Portugal in reaching the Confederations Cup semifinals on Sunday with a 3-1 victory over a Cameroon side reduced to 10 men after further confusion with experimental video replays.
Germany was leading through Kerem Demirbay’s 48th-minute goal when a case of mistaken identity halfway through the second half — precisely the kind of situation that video replay is meant to correct — left Cameroon, the African champion, irritated.
Sebastien Siani was dismissed for a challenge on Germany’s Emre Can after the referee, Wilmar Roldan of Colombia, inspected a field-side monitor. But it took furious protests from the Cameroon players, including Siani’s sarcastically applauding Roldan, for the referee to check the monitor again and discover he had sent off the wrong player.
Siani was called back on to the field, and Ernest Mabouka was — correctly — sent off.