Manchester United travel to the Allianz Arena to face European and German champions Bayern Munich later on tonight.
Many have tipped Bayern Munich to comfortably beat Manchester United in Germany, however even the average football fans know you should never write off the Premier League champions.
Bayern Munich dominated proceedings in the first half of the first leg - but were restricted to just one goal due to the all-round impressive display from David Moyes' side.
Here we take a look at where the second leg will be won and lost tonight.
Click through the following pages to view our key battles and comment in the box below if you agree or disagree with our selection.