In the 25th minute of the game, home team Borussia Dortmund's Greek center-back Sokratis Papastathopoulos attempted a header from a corner kick that rattled the crossbar.
Eight minutes later, Dortmund's Shinji Kagawa missed the target. Japanese attacking midfielder received a back-heel pass from Armenian Henrikh Mkhitaryan; he, however, shot the ball outside of his right foot and it went out.
In the 38th minute, Borussia Dortmund scored the leading goal with Marco Reus. German star of the team received a deadly through ball from Polish right-back Lukasz Piszczek and made a classy low shot beating Galatasaray goalkeeper Fernando Muslera, 1-0.
In the 52nd minute, some sections of the Galatasaray crowd threw fireworks on the pitch. The referee stopped the game for a brief period.
In the 56th minute, Dortmund doubled the gap with Sokratis. The 34-year-old veteran midfielder of "Die Schwarzgelben," or The Black and Yellows, Sebastian Kehl nodded the ball to Sokratis, who tapped the ball into the net by a volley in the six-yard box, 2-0.
In the 70th minute, Galatasaray narrowed the gap to one. Turkish left-back Hakan Balta headed the ball from a corner, 2-1. Hakan was assisted by Dutch star Wesley Sneijder.
Four minutes later, Borussia Dortmund made it three on a breakaway. Italian striker Ciro Immobile finished in one-on-one, 3-1. In the meantime, Galatasaray goalkeeper Muslera suffered a minor injury after colliding with Immobile.
In the 83rd minute, Borussia Dortmund forward Pierre-Emerick Aubameyang missed the fourth goal in front of the goal; Galatasaray defender Aurelien Chedjou tackled and cleared the ball.
Two minutes later, German side made the score 4-1 as Galatasaray centre-back Semih Kaya accidentally scored an own goal. Immobile crossed from right, the ball hit Semih's heel and went in.
"Undefeated" Group D leaders Borussia Dortmund -- having 12 points -- qualified for the Round of 16 with two games to spare.
Meanwhile, in another match of the group, English club Arsenal received a shocking 3-3 draw against Belgian team Anderlecht in London. "Gunners" could not secure the 3-0 win against Anderlecht at their home.
