Pep Guardiola's men will look to bounce back quickly from Saturday's disappointing defeat to Leeds United.
Leading 2-1 going into the second leg, City know Dortmund represent a sizeable hurdle if we are to progress to the semi-finals.
The game is on Wednesday, 8pm kick-off.
It was cold and sunny at the CFA today, so plenty of hats, snoods and gloves on show.
Watch the session highlights on the video above!