At least four former European champions will be among eight teams eliminated from the Champions League when the new knockout playoff round ends this week: Real Madrid or Manchester City, Bayern Munich or Celtic,

Henning Berg and Aitor Karanka highlight how Real Madrid's tactical discipline, zonal approach and use of the mid-block laid the foundations for victory at Manchester City.

The first legs of the Champions League knockout phase has come to a close and none of the eight matches ended in a draw. With a spot in the round of 16 on the line, most clashes are hanging in the balance as Borussia Dortmund and Paris Saint-Germain were the only teams to win their matches by more than one goal.