SALVADOR, Brazil — Thomas Mueller scored a hat trick as Germany turned on its style and power to rout 10-man Portugal 4-0 in their World Cup Group G opener on Monday.
Mueller, who led the 2010 World Cup with five goals, was ruthless against a weak Portugal team that was clearly outplayed despite the presence of Cristiano Ronaldo.
With Chancellor Angela Merkel supporting in the stands, the German team celebrated its 100th World Cup match with a rousing victory that was virtually assured by halftime.
"After 20 minutes, we looked up at the clock and thought it was going to be a long day," Mueller said. "But we got into the match very well and when you lead by 2-0 in this heat and then even get the third, it was all over."
Germany always aims to have an impressive start and it certainly did this time. Four years ago, it started with a 4-0 win over Australia and reached the semifinals.
What must be worrying for Germany's opponents is the apparent ease with which Joachim Loew's lineup disposed of the fourth-ranked team in the world. Germany next faces Ghana on June 21 and the United States on June 26.
Mueller scored either side of Mats Hummels' headed goal as Germany took a 3-0 lead at the break, and added his third goal in the 81st.
Ronaldo started at Arena Fonte Nova after overcoming a knee injury. He faded after threatening early in the match, including a shot from a break that Germany goalkeeper Manuel Neuer could only block, but there was nobody from Portugal to pounce on the rebound.
Portugal was already 2-0 down before Pepe was red carded in the 37th minute for apparently head-butting Mueller when the German player was sitting on the ground. Pepe had stuck his hand into Mueller's face and the German went down.
"I got hit but after that I am not really sure what happened," Mueller said.
It was Mueller who opened the scoring in the 12th minute after Mario Goetze had been pulled down by Joao Pereira in the box, coolly slotting the penalty kick into the right corner of Rui Patricio's goal.
"I've been in some big matches before, so it's not like I was afraid," Mueller said.
Hummels had risen above Pepe to double Germany's lead with a well-timed header from a corner in the 32nd, and Mueller extended the buffer just before the break when he stripped the ball from Bruno Alves and drilled in a low shot.
The Bayern Munich forward completed the rout late in the second half, poking in from close range after Patricio had fumbled a low cross from substitute Andre Schuerrle. He said the margin should have been bigger.
"We should have used some of our chances better," Mueller said, adding that it was hard to play in midday heat and humidity.
Portugal's chances were limited. Ronaldo fired a powerful free kick late in the match but Neuer punched it away.
Portugal also lost big striker Hugo Almeida to an injury. He was replaced by Eder in the 28th.
Fabio Coentrao injured a groin muscle and was helped off the field in 65th, to be replaced by Andre Almeida.
Hummels then limped off the field with a right-knee injury, giving substitute defender Shkodran Mustafi his second cap.
Germany could have scored more goals after the break but Mario Goetze and Mesut Ozil wasted good chances.