AC Milan's reunion with southern European rivals Barcelona takes centre stage in the second set of first-leg fixtures in the UEFA Champions League Round of 16.
Two other former champions are also in action, with Porto taking on surprise package Malaga, and Bayern
Big-spending Galatasaray will be looking to carry their strong UEFA Champions League group stage form into Wednesday's last 16, first-leg tie when they host a Schalke 04 side low on confidence.
The Turkish side finished their Group H campaign with wins over Cluj, Manchester United and Braga then