Borussia Dortmund Manager Jurgen Klopp Explodes on 4th Official (GIF)

Michael Cummings@MikeCummings37World Football Lead WriterSeptember 18, 2013

Borussia Dortmund experienced a nightmare start to their UEFA Champions League campaign Wednesday, losing 2-1 at Napoli.

Beaten finalists last season, BVB opened the 2013-14 Champions League season with a trip to Italy to face Napoli. Put simply, things didn't go well.

First, Gonzalo Higuain gave Napoli a 1-0 lead with a 28th-minute header. During the play, BVB's Neven Subotic was waiting to re-enter the pitch after receiving treatment for an injury.

Clearly incensed, Klopp decided to…erm…discuss the situation with the fourth official. The polite discussion ended with Klopp being sent off:

Then, late in the first half, Dortmund goalkeeper Roman Weidenfeller drew a red card for handling the ball outside the box. With backup goalkeeper Mitchell Langerak manning the net, BVB went down 2-0 in the 67th minute after Lorenzo Insigne's picturesque free kick:

Dortmund pulled one back in the 87th minute through a Juan Zuñiga own goal, but the damage had already been done. 

Next up for Dortmund in the Champions League is a home match against Marseille on Oct. 1.