BERLIN: Bayern Munich opened a nine-point lead at the top of the Bundesliga on Tuesday as Serge Gnabry claimed a hat-trick and Robert Lewandowski scored twice in a 5-0 rout at strugglers Stuttgart. Gnabry scored either side of half-time before the flood gates opened with three goals in a devastating fine-minute spell as Lewandowski scored in quick succession. The Poland striker has now scored 18 goals in 16 league games this season as Bayern earned a tenth straight Bundesliga win at Stuttgart dating back to 2009. The Bavarian giants remain on course to win a 10th consecutive Bundesliga title, but second-placed Borussia Dortmund can trim their gapping lead when they host bottom side Greuther Fuerth on Wednesday. Injuries and illness already meant Bayern again fielded Jamal Musiala, 18, out of position in the defensive midfield alongside Marc Roca and winger Kingsley Coman went off with a leg knock in the opening half hour. Coman’s replacement Leroy Sane set up Gnabry’s opening goal by charging through an gaping hole, which grew wider when Stuttgart center-back Waldemar Anton lost his footing. Sane squared to Stuttgart-born Gnabry who curled his shot around home goalkeeper Florian Mueller to make it 1-0 at the break. Stuttgart raised the tempo at the start of the second half as strikers Philipp Foerster and Omar Marmoush both had chances, but it was virtually one-way traffic from Bayern thereafter. The visitors doubled their lead when Marmoush yielded possession and the ball was moved to Gnabry who again curled his shot around the diving Mueller. Stuttgart’s defense capitulated as Bayern scored three goals in five devastating minutes. It started when Gnabry’s long-range pass picked out Lewandowski who chipped Mueller. Moments later, Gnabry dribbled into the box and set up Lewandowski who tapped home with a well-timed slide. Bayern were now in full flow. Gnabry claimed the second Bundesliga hat-trick of his career when he slotted home after Thomas Mueller’s shot had been parried by Stuttgart’s luckless goalkeeper.