The Real Madrid vs Borussia Dortmund match in the 2017-18 UEFA Champions League group stage was played over two legs, with Real Madrid winning 6-3 on aggregate. The first leg was played at Signal Iduna Park in Dortmund on September 26, 2017, and ended in a 3-1 victory for Real Madrid. The second leg was played at Santiago Bernabeu in Madrid on December 6, 2017, and ended in a 3-2 victory for Real Madrid.

In the first leg, Gareth Bale opened the scoring for Real Madrid in the 18th minute with a stunning long-range strike that went in off the post. Dortmund equalized just before halftime through Pierre-Emerick Aubameyang, but Real Madrid regained the lead in the second half through Cristiano Ronaldo, who scored from close range after a cross from Bale. Ronaldo added another goal in the 79th minute to secure the 3-1 victory for Real Madrid.

In the second leg, Borja Mayoral opened the scoring for Real Madrid in the 8th minute with a close-range finish. Dortmund equalized through Aubameyang in the 43rd minute, but Real Madrid regained the lead just before halftime with a goal from Lucas Vazquez. In the second half, Dortmund equalized again through Aubameyang, but a late goal from Ronaldo secured the 3-2 victory for Real Madrid.

Overall, the two victories ensured Real Madrid finished top of Group H with 13 points, while Dortmund finished third with just two points, failing to qualify for the knockout stages of the competition.