Bayern thought they had broken the deadlock just minutes into the encounter. Karl controlled the ball and swept home a fine finish from just inside the penalty area, but the goal was chalked off as Gnabry had strayed fractionally offside. The hosts went on to have the better chances of the opening 45 minutes but couldn’t find a way past goalkeeper Rui Silva. Harry Kane was denied by the post, while Karl went even closer just before half-time after a jinking run but saw his effort palmed away by Silva.
Those misses proved to be costly as Sporting stunned the Allianz Arena at the start of the second half. A quick break down the left flank saw Joao Simoes beat Tah and fire a ball across goal. A lunging Kimmich tried to block the shot but succeeded only in diverting the ball past Bayern stopper Manuel Neuer to hand the visitors a shock lead.
Bayern hit back within 10 minutes courtesy of some criminal defending by the visitors. A corner in from the right by Michael Olise found Gnabry completed unmarked at the far post and left with the simple task of hooking the ball home to make it 1-1.
Four minutes later, Bayern were in front and it was no surprise to see the irrepressible Karl netting. The 17-year-old ran onto a ball in the box, cushioned it perfectly on his left foot before lashing home with his right to put Bayern in front for the first time in the game.
Sporting's resistance was broken and Bayern went on to seal the win through Tah. Kimmich went some way to making amends for his earlier own goal by pinging a ball from deep into the penalty area for Olise to head back into the danger area. His header found an unmarked Tah with all the time in the world to poke home Bayern's third to seal the win.
