"We wanted to continue in the Champions League.
Two goals on the night from forward Pierre-Emerick Aubameyang were not enough to give Dortmund the win, and Bosz spoke about his hopes of keeping the player amid rumors of a transfer away.
"He isn't a player for Madrid... I'm joking of course," the Dutchman intimated. "He has shown many times what a great player he is.
Aubameyang is the third player after Del Piero and Lewandowski who scored at least 5 goals in the UCL against Real Madrid, interesting..— Eric (@PulisicChip) December 6, 2017
"He has speed and scores a lot of goals; I hope he will stay with us for many years."
Despite a poor run of results, which has seen Dortmund lose key players to injury, the former Ajax boss still remains positive and knows that once his star performers return the results will improve.
.@BVB's Maximilian #Philipp has suffered a serious injury to his kneecap, and will be out for several months. We wish you all the best for your recovery, Milli! — Bundesliga English (@Bundesliga_EN) December 5, 2017
More info https://t.co/iL5NMnlURn pic.twitter.com/k6pMQj5ZDT
"When the injured players return we'll improve. We still have to improve our level of performance, today went very badly.
"We showed at times that we can play football very well."
Der BVB face Werder Bremen at home on the weekend and will hope to pick up their first win in the Bundesliga for over two months.