Tuesday will be remembered mostly as a day of upsets in the UEFA Champions League as Real Madrid and Manchester City — Europe's two most recent title holders — both suffered lopsided defeats.

The Leverkusen coach was given a warm welcome on his return to the club where he became a fan favorite as a player over five seasons between 2004-09. Alonso won the Champions League with Liverpool in 2005.

Matchday four of the Champions League saw the two of the most successful sides in the competition facing off, as well as a former Liverpool legend returning to Anfield. Real Madrid hosted AC Milan in a bid to recover after a poor start to the season by their lofty standards,