FIFA World Cup 2014: Germany vs Portugal 13th Match in Pictures

Thomas Mueller scored a hat-trick as Germany thrashed Portugal 4-0 to leave Cristiano Ronaldo's dreams of dominating the World Cup in tatters on Monday.

Bayern Munich star Mueller bagged the first treble of his international career as Germany shrugged off a troubled build-up to the tournament to make a flying start in Group G.

But it was a disastrous afternoon at Salvador's Fonte Nova Arena for Ronaldo and Portugal, who had defender Pepe sent off for a first half headbutt on Mueller.

A wretched outing for Portugal was compounded by the sight of Real Madrid defender Fabio Coentrao being stretchered off in the second half.

Portugal's forward and captain Cristiano Ronaldo (L) shoots past Germany's defender Per Mertesacker during the Group G football match between Germany and Portugal at the Fonte Nova Arena in Salvador.

Germany's forward Thomas Mueller (R) scores a penalty past Portugal's goalkeeper Rui Patricio.

Germany fan poses prior to the Group G football match between Germany and Portugal.

Portugal's defender Pepe (R) fouls Germany's forward Thomas Mueller before being sent off.

Portugal's defender Pepe (front) receives the red card from Serbian referee Milorad Mazic.

Germany's defender Mats Hummels (R) celebrates scoring in front of Portugal's forward and captain Cristiano Ronaldo.

German Chancellor Angela Merkel poses with the German squad.

German Chancellor Angela Merkel (R) applauds as she stands alongside FIFA President Sepp Blatter (L) during the Group G football match between Germany and Portugal.

German players celebrate during the Group G football match between Germany and Portugal.

Germany's forward Mario Goetze controls the ball.

Germany supporter wears a moustache featuring the colours of the German flag.

Germany's defender Mats Hummels (R) celebrates after scoring a goal.

Germany's defender Mats Hummels celebrates scoring the 2-0 goal.

Germany's forward Thomas Mueller (front) heads the ball.

A German flag is waved behind fans of the Portugese football team fans at Eduardo VII Park in Lisbon, following the public viewing of FIFA World Cup 2014 match Germany vs Portugal.

Germany's forward Thomas Mueller celebrates scoring the 3-0.

Portugal fans kiss a replica World Cup trophy.

Portugal's coach Paulo Bento looks on during the football match Germany vs Portugal.

Portugal's defender Andre Almeida plays the ball.

Portugal's forward and captain Cristiano Ronaldo (L) and Germany's midfielder Toni Kroos vie.

Portugal's forward and captain Cristiano Ronaldo reacts.

Portugal's forward Eder (L) challenges Germany's defender Benedikt Hoewedes for the ball.

Members of Germany's national team, (Back row L-R) Germany's goalkeeper Manuel Neuer, Germany's midfielder Toni Kroos, Germany's defender Per Mertesacker, Germany's defender Benedikt Hoewedes, Germany's defender Mats Hummels, Germany's midfielder Sami Khedira and Germany's defender Jerome Boateng (Front row L-R) Germany's defender and captain Philipp Lahm, Germany's forward Mario Goetze, Germany's forward Thomas Mueller and Germany's midfielder Mesut Ozil pose for the team photo.

(AFP Photo)