The Bayern Munich midfielder scored a hat-trick en route to his side’s thumping of Cristiano Ronaldo’s men, who painted an increasingly frustrated figure on the field as the game went on.
The Germans were up as early as the 11th minute, after defender Joao Pereira took down Mario Gotze in the Germany penalty area. Muller slotted home for the spot to give the World’s 2nd0ranked side the advantage.
Having taken the lead, Germany looked confident on the ball, and doubled their advantage on the half-hour mark as defender Matts Hummels rose highest to head home a corner.
Things got bad to worse for Portugal as central defender Pepe reacted to a slight infringement on German forward Thomas Muller, and received a straight red for head-butting his opponent, who he thought made a meal out of the challenge.
Down to ten men, Portugal then conceded another just before the break, Muller adding a second after good control and swift shot from the middle of the 18-yard area.
It was always going to be tough for Portugal in the second period, and their misery was further compounded as marauding left-back Fabio Coentrao was stretchered off after seemingly pulling his hamstring.
Despite the odd freekick, Portugal rarely threatened, and Muller made it eight goals in his last eight World Cup games by scrambling the ball over the line with just fifteen minutes left on the clock to complete the romp on his way to receiving the man of the match award.
Neuer denied Ronaldo a late consolation goal as Portugal conceded four goals for the first time in their World Cup history, as the Germans lay down the gauntlet for the rest of their Group G opponents.