#3 Flop: Emre Can
Emre Can was sent off for violent conduct just before second-half stoppage-time and with time ticking down as Dortmund crashed out of the Champions League, this sequence of events typified the visitors' frustration. He charged in late on Neymar with a needlessly forceful challenge near the touchline, prompting an on-pitch scuffle as multiple players raced to get involved and referee Anthony Taylor watched it all unfold before brandishing red.
26-year-old Can joined BVB on a permanent deal last month, mere weeks after completing a loan move from Juventus. Heralded as an experienced head for games like these given his ability, he froze when it mattered most and was made ineffective by the Gueye-Paredes pairing.
It wasn't just him either: Axel Witsel looked bemused when hooked after 70 minutes, but could have no complaints - knock or otherwise - as he was largely pedestrian in midfield and didn't help his teammates enough defensively.
Can had 84% pass success (39 made), completed one dribble, won four duels with a clearance, tackle and interception over the 90 minutes. Considering the ease at which Paredes and Neymar got forward down his side of the pitch, he should have been more involved protecting his backline - recording similar stats to Gueye.
You can understand the German's frustrations, but had he instead channeled that same aggressiveness and energy in the right way, this may have been a different game.