And Broos told reporters after the match he was never given an explanation from the referee. "It was a very high quality match and we showed we can compete at this level, and at times impose our style".
Clive Tyldesley, stunned by the initial decision, said: "Well he can't be red carded... he didn't commit the foul".
Aboubakar and substitute Moumi Ngamaleu both spurned decent chances as Cameroon tried to respond, but they were dealt a blow when Mabouka saw red for his high tackle on Can in the 64th minute and Werner made them pay two minutes later when diving low to head home Kimmich's cross. There were flickers of a comeback by the African champions when Vincent Aboubakar's header slipped through Marc-Andre Ter Stegen's raised hands.
"Mexico is going to be a tough game, they are a very flexible team with very good players", said Loew, who became the first head coach to achieve 100 global wins.
The Germans will have to display greater urgency against Mexico than they did in the first half against Cameroon.
Their best first-half chance fell to Andre-Frank Zambo Anguissa, whose side-footed volley following Mabouka's cross was well saved by Ter Stegen just before half-time.
"Some of my players have no experience and were nervous because one mistake could have eliminated us", Loew said through a translator.
"We want to be seen to be completely different".
Taking the lead in slick fashion.More news: SEC, SEC: Tigers, Gators set to play for national title
More news: Sailing-New Zealand reach match point against US in America's Cup final
More news: Could Louis Riddick be the Chiefs next general manager?
A superb back-heel from captain Julian Draxler steered the ball into the path of the former Turkey junior worldwide and he rifled a shot into the roof of the net from the edge of the box.
"I didn't know what happened, it was a yellow card then a red card, then a red card for another player". Werner evaded Adolphe Teikeu to meet a cross from Kimmich and open his worldwide account with his stooping header.
Roldan initially sent off midfielder Siani, drawing furious Cameroonian protests with Broos incensed on the sidelines, and even Germany boss Loew got involved.
Cahill's stunning volley against the Netherlands will go down as one of the greatest goals ever scored at a FIFA World Cup.
The Socceroos were excellent in Moscow, dominating for large periods against the South American champions, but failed in their bid to achieve the two-goal victory that would have put them through to face Portugal in the semi-finals.
Having become Chile's all-time top-scorer by scoring early against Germany, Arsenal's striker Alexis Sanchez will be looking to add to his tally of 38 worldwide goals. "Overall, I am very happy", said Loew.
With Australia's FIFA Confederations Cup campaign now over, Cahill and the team's next focus will be qualifying for the World Cup in Russian Federation next year.
"It was a very intense match, a match that was marked by strategical play and it was very demanding in that sense", Loew said.
"When the whistle goes we'll start and we'll try to match their intensity, match their work rate, match their emphasis on trying to dominate the game and see where that takes us".
In his 150th game in charge, and aiming for a century of victories, German head coach Low made four changes to the team that drew 1-1 with Chile on Thursday, including bringing in Werner up front as Lars Stindl was rested.